UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

SCHEDULE TO

(RULE 14d-100)

TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1)

OF THE SECURITIES EXCHANGE ACT OF 1934

CTRIP.COM INTERNATIONAL, LTD.

(Name of Subject Company (Issuer))

CTRIP.COM INTERNATIONAL, LTD.

(Name of Filing Person (Issuer))

1.25% Convertible Senior Notes due 2022

(Title of Class of Securities)

22943F AM2

(CUSIP Number of Class of Securities)

Cindy Xiaofan Wang

Chief Financial Officer

Ctrip.com International, Ltd.

968 Jin Zhong Road

Shanghai 200335

People’s Republic of China

+86 (21) 3406-4880

with copy to:

(Name, address and telephone number of person authorized to receive notices and communications on behalf of the filing person)

CALCULATION OF FILING FEE

Check the appropriate boxes to designate any transactions to which the statement relates:

Check the following box if the filing is a final amendment reporting the results of the tender offer:   ☐

If applicable, check the appropriate box(es) below to designate the appropriate rule provision(s) relied upon:

INTRODUCTORY STATEMENT

As required by, pursuant to the terms of and subject to the conditions set forth in the Indenture dated as of September 12, 2016 (the “Indenture”), by and between Ctrip.com International, Ltd. (the “Company”) and The Bank of New York Mellon, as trustee and paying agent (the “Trustee” and the “Paying Agent”), for the Company’s 1.25% Convertible Senior Notes due 2022 (the “Notes”), this Tender Offer Statement on Schedule TO (“Schedule TO”) is filed by the Company with respect to the right of each holder (the “Holder”) of the Notes to sell and the obligation of the Company to purchase the Notes, as set forth in the Company’s Put Right Notice to the Holders dated August 14, 2019 (the “Put Right Notice”) and the related notice materials filed as exhibits to this Schedule TO (which Put Right Notice and related notice materials, as amended or supplemented from time to time, collectively constitute the “Put Option”).

This Schedule TO is intended to satisfy the disclosure requirements of Rule 13e-4(c)(2) under the Securities Exchange Act of 1934.

ITEMS 1 through 9.

The Company is the issuer of the Notes and is obligated to purchase all of the Notes if properly tendered by the Holders under the terms and subject to the conditions set forth in the Put Option. The Notes are convertible into the Company’s American depositary shares (“ADSs”), each representing 0.125 ordinary shares, par value US$0.01 per share of the Company, subject to the terms, conditions and adjustments specified in the Indenture and the Notes. The Company maintains its principal executive offices at 968 Jin Zhong Road, Shanghai 200335, People’s Republic of China, and the telephone number at this address is +86 (21) 3406-4880. The Company’s registered office in the Cayman Islands is located at the offices of Maples Corporate Services Limited, P.O. Box 309, Ugland House, Grand Cayman KY1-1104, Cayman Islands.

As permitted by General Instruction F to Schedule TO, all of the information set forth in the Put Option is incorporated by reference into this Schedule TO.

(a)        Pursuant to Instruction 2 to Item 10 of Schedule TO, the Company’s financial condition is not material to a Holder’s decision whether to put the Notes to the Company because (i) the consideration being paid to Holders surrendering Notes consists solely of cash, (ii) the Put Option is not subject to any financing conditions, (iii) the Put Option applies to all outstanding Notes, and (iv) the Company is a public reporting company that files reports electronically on EDGAR. The financial condition and results of operations of the Company and its subsidiaries are reported electronically on EDGAR on a consolidated basis.

Not applicable.

SIGNATURE

After due inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: August 14, 2019

EXHIBIT INDEX

Exhibit (a)(1)

PUT RIGHT NOTICE

TO HOLDERS OF

1.25% CONVERTIBLE SENIOR NOTES DUE 2022

ISSUED BY

CTRIP.COM INTERNATIONAL, LTD.

CUSIP No. 22943F AM2

Reference is made to that certain Indenture, dated as of September 12, 2016 (the “Indenture”), by and between Ctrip.com International, Ltd. (the “Company”) and The Bank of New York Mellon, as trustee and paying agent (the “Trustee” and the “Paying Agent”), for the Company’s 1.25% Convertible Senior Notes due 2022 (the “Notes”). Capitalized terms used but not defined herein shall have the meaning ascribed to such terms in the Indenture.

Notice is hereby given pursuant to Section 15.01 of the Indenture that, at the option of each holder of the Notes (the “Holder”), the Company will repurchase such Holder’s Notes or any portion of the principal thereof that is equal to US$1,000 or an integral multiple thereof at a purchase price (the “2019 Repurchase Price”) equal to 100% of the principal amount of the Notes to be repurchased, plus any accrued and unpaid interest to, but excluding, September 15, 2019, which is the date specified for repurchase in the Indenture (the “2019 Repurchase Date”), subject to the terms and conditions of the Indenture, the Notes and this Put Right Notice and related notice materials, as amended and supplemented from time to time (the “Put Right”). To exercise its Put Right, a Holder must deliver a 2019 Repurchase Notice (as further described in this Put Right Notice) at any time between 9:00 a.m., New York City time, on Wednesday, August 14, 2019 and 5:00 p.m., New York City time, on Thursday, September 12, 2019 (the “Expiration Date”), which is the second Business Day immediately preceding the 2019 Repurchase Date.

To exercise your Put Right and receive the 2019 Repurchase Price, you must deliver the Notes through the transmittal procedures of the Depository Trust Company (“DTC”) prior to 5:00 p.m., New York City time, on the Expiration Date. Notes delivered through the transmittal procedures of DTC for purchase may be withdrawn at any time prior to 5:00 p.m., New York City time, on Thursday, September 12, 2019, which is the second Business Day immediately preceding the 2019 Repurchase Date, by complying with the withdrawal procedures of DTC. The surrender by a Holder of any Notes to DTC via the transmittal procedures of DTC’s Automated Tender Offer Program will constitute delivery of a 2019 Repurchase Notice that satisfies such Holder’s notice requirements for its exercise of its Put Right.

The Trustee has informed the Company that, as of the date of this Put Right Notice, all custodians and beneficial holders of the Notes hold the Notes through DTC accounts and that there are no certificated Notes in non-global form.

The Paying Agent is

The Bank of New York Mellon

and for purposes of this Put Right Notice, the address is:

Dated: August 14, 2019

TABLE OF CONTENTS

No person has been authorized to give any information or to make any representation other than those contained in this Put Right Notice and, if given or made, such information or representation must not be relied upon as having been authorized. You should not assume that the information contained in this Put Right Notice is accurate as of any date other than the date on the front of this Put Right Notice. This Put Right Notice does not constitute an offer to buy or the solicitation of an offer to sell securities in any circumstances or jurisdiction in which such offer or solicitation is unlawful. The delivery of this Put Right Notice shall not under any circumstances create any implication that the information contained in this Put Right Notice is current as of any time subsequent to the date of such information. None of the Company, its board of directors, or its executive management is making any representation or recommendation to any Holder as to whether or not to exercise the Put Right. You should consult your own financial and tax advisors and must make your own decision as to whether to exercise the Put Right and, if so, the principal amount of Notes for which the Put Right should be exercised.

SUMMARY TERM SHEET

The following are answers to some of the questions that you may have about the Put Right. To understand the Put Right fully and for a more complete description of the terms of the Put Right, we urge you to carefully read the remainder of this Put Right Notice because the information in this summary is not complete. We have included page references to direct you to a more complete description of the topics in this summary.

Who is offering to purchase my Notes?

Ctrip.com International, Ltd., a Cayman Islands company (the “Company”), is obligated to purchase those 1.25% Convertible Senior Notes due 2022 with respect to which you validly exercise your Put Right. (Page 6)

Why is the Company offering to purchase my Notes?

The right of each Holder of the Notes to sell and the obligation of the Company to purchase such Holder’s Notes pursuant to the Put Right at the time described in this Put Right Notice is a term of the Notes and has been a right of the Holders from the time the Notes were issued on September 12, 2016. We are required to repurchase the Notes of any Holder that exercises its Put Right pursuant to the terms of the Notes and the Indenture. (Page 6)

Which of the Notes is the Company obligated to purchase?

We are obligated to purchase all of the Notes surrendered (and not withdrawn) by any Holder through the facilities of, and in accordance with the procedures of, the Depository Trust Company (“DTC”) prior to 5:00 p.m., New York City time, on Thursday, September 12, 2019. As of August 13, 2019, US$975,000,000 in aggregate principal amount of the Notes was outstanding. The Notes were issued under the Indenture, dated as of September 12, 2016 (the “Indenture”), by and between the Company and The Bank of New York Mellon, as trustee and paying agent (the “Trustee” and the “Paying Agent”). The surrender by a Holder of any Notes to DTC via the transmittal procedures of DTC’s Automated Tender Offer Program will constitute delivery of a 2019 Repurchase Notice that satisfies such Holder’s notice requirements for its exercise of its Put Right. (Page 6).

How much will the Company pay and what is the form of payment?

Pursuant to the terms of the Indenture and the Notes, we will pay, in cash, a repurchase price equal to 100% of the principal amount of the Notes, plus any accrued and unpaid interest to, but excluding, September 15, 2019 (the “2019 Repurchase Price”), with respect to any and all Notes validly surrendered for repurchase and not withdrawn; provided that such accrued and unpaid interest (if any) will not be paid to the Holder submitting the Notes for repurchase on September 15, 2019 but will be paid to the Holder of record as of 5:00 p.m., New York City time, on Sunday, September 1, 2019. (Pages 6-7)

How much accrued and unpaid interest will the Company pay as part of the 2019 Repurchase Price?

None. Pursuant to the terms of the Indenture and the Notes, the next interest payment date for the Notes is Sunday, September 15, 2019. Accordingly, on the next succeeding Business Day, September 16, 2019, the Company will pay accrued and unpaid interest on all of the Notes through September 14, 2019, to all Holders who were Holders of record as of 5:00 p.m., New York City time, on Sunday, September 1, 2019, regardless of whether the Put Right is exercised with respect to such Notes. As a result, on September 15, 2019, which is the date specified in the Indenture for repurchase (the “2019 Repurchase Date”), there will be no accrued and unpaid interest on the Notes. (Pages 6-7)

1

Can the Company redeem the Notes?

Subject to the provisions of the Indenture, the Company may, at its option, on not less than 30 days’ nor more than 60 days’ prior notice, redeem all but not part of the Notes (except in respect of certain Holders that elect otherwise as described in the Indenture) in connection with a change in tax law at a redemption price equal to 100% of the principal amount plus accrued and unpaid interest, if any, to, but not including, the redemption date as described in the Indenture. Upon receiving such notice of redemption, each Holder will have the right to elect to not have its Notes redeemed, subject to the provisions of the Indenture. (Page 8)

What are my rights to convert my Notes?

Subject to and upon compliance with the provisions of the Indenture, a Holder will have the right, at such Holder’s option, to convert all or any portion (if the portion to be converted is US$1,000 principal amount or an integral multiple thereof) of such Note at any time prior to 5:00 p.m., New York City time, on Wednesday, September 14, 2022 at an initial conversion rate of 15.2688 ADSs (subject to certain adjustments, the “Conversion Rate”) per US$1,000 principal amount of Notes (the “Conversion Obligation”). If a Holder has already delivered a Fundamental Change Repurchase Notice or a 2019 Repurchase Notice with respect to a Note, such Holder may not surrender that Note for conversion until the Holder has withdrawn the applicable repurchase notice in accordance with the Indenture. The conversion of your Notes is subject to the provisions regarding conversion contained in the Indenture and the Notes.

Generally, if you exercise the conversion right and the price per ADS is less than the Conversion Price during the relevant observation period, the value of the consideration that you receive in exchange for your Notes will be less than the aggregate principal amount of the Notes. The Conversion Price at any given time is computed by dividing US$1,000 by the applicable Conversion Rate at such time. (Page 7)

How will the Company fund the purchase of the Notes?

The Company plans to use its cash balance as of the 2019 Repurchase Date to fund the purchase of the Notes, and may arrange short-term loan if the aggregate principal amount of Notes that the Company is obligated to purchase becomes substantial. (Page 7)

How can I determine the market value of the Notes?

There is no established reporting system or market for trading in the Notes. To the extent that the Notes are traded, prices of the Notes may fluctuate widely depending on trading volume, the balance between buy and sell orders, prevailing interest rates, the Company’s operating results, the market price and implied volatility of the Company’s ADSs and the market for similar securities. To the extent available, Holders are urged to obtain current market quotations for the Notes prior to making any decision with respect to the Put Right. The value of the Notes upon exercise of the conversion right will be based on the applicable conversion rate for the Notes, as summarized above, under the caption “What are my rights to convert my Notes?” (Pages 7-8)

What does the board of directors of the Company think of the Put Right?

The board of directors of the Company has not made any recommendation as to whether you should exercise the Put Right. You must make your own decision whether to exercise the Put Right and, if so, the principal amount of Notes for which the Put Right should be exercised. (Page 7)

2

When does the Put Right expire?

Your right to exercise the Put Right expires at 5:00 p.m., New York City time, on Thursday, September 12, 2019 (the “Expiration Date”), which is the second Business Day immediately preceding the 2019 Repurchase Date. We will not extend the period Holders have to exercise the Put Right unless required to do so by U.S. federal securities law. (Page 6)

What are the conditions to the purchase by the Company of the Notes?

Our purchase of Notes for which the Put Right is validly exercised is not subject to any condition other than such purchase being lawful, the relevant Notes being surrendered and the procedural requirements described in this Put Right Notice being satisfied. (Page 6)

How do I exercise the Put Right?

The Trustee has informed the Company that, as of the date of this Put Right Notice, all custodians and beneficial holders of the Notes hold the Notes through DTC accounts and that there are no certificated Notes in non-global form. Accordingly, you may exercise the Put Right with respect to your Notes held through DTC, prior to 5:00 p.m., New York City time, on the Expiration Date, in the following manner

While we do not expect any Notes to be issued to a Holder other than DTC or its nominee in physical certificates after the date hereof, in the event that physical certificates evidencing the Notes are issued to such a Holder, any such Holder who desires to tender Notes pursuant to the Put Right and holds physical certificates evidencing such Notes must complete and sign a 2019 Repurchase Notice in the form attached hereto as Annex A (a “2019 Repurchase Notice”) in accordance with the instructions set forth therein, have the signature thereon guaranteed and timely deliver such manually signed 2019 Repurchase Notice, together with the certificates evidencing the Notes being tendered and all necessary endorsements, to the Paying Agent.

By surrendering your Notes through the transmittal procedures of DTC or to the Paying Agent, as applicable, you agree to be bound by the terms of the Put Right set forth in this Put Right Notice. (Pages 9-10)

HOLDERS THAT HOLD NOTES THROUGH DTC ACCOUNTS MAY ONLY EXERCISE THE PUT RIGHT BY COMPLYING WITH THE TRANSMITTAL PROCEDURES OF DTC AND SHOULD NOT SUBMIT A PHYSICAL 2019 REPURCHASE NOTICE.

If I exercise the Put Right, when will I receive payment for my Notes?

We will forward the appropriate amount of cash required to pay the 2019 Repurchase Price for your Notes to the Paying Agent, prior to 10:00 a.m., New York City time, on Monday, September 16, 2019, which is the next succeeding Business Day after the 2019 Repurchase Date, and the Paying Agent will promptly distribute the consideration to DTC, the sole Holder of record of the Notes. DTC will thereafter distribute the cash to its participants in accordance with its procedures. To the extent that you are not a DTC participant, your broker, dealer, commercial bank, trust company or other nominee, as the case may be, will distribute the cash to you. (Pages 11-12)

3

Until what time may I withdraw my previous exercise of the Put Right?

You may withdraw your exercise of the Put Right with respect to any Notes at any time until 5:00 p.m., New York City time, on Thursday, September 12, 2019, which is the second Business Day immediately preceding the 2019 Repurchase Date. (Page 11)

How do I withdraw my previous exercise of the Put Right?

To withdraw your previous exercise of the Put Right with respect to any Notes, you must comply with the withdrawal procedures of DTC prior to 5:00 p.m., New York City time, on Thursday, September 12, 2019, which is the second Business Day immediately preceding the 2019 Repurchase Date. While the Trustee has informed us that there are currently no certificated Notes in non-global form, in the event that after the date hereof physical certificates evidencing the Notes are issued to a Holder other than DTC or its nominee, any such Holder who desires to withdraw any Notes evidenced by physical certificates with respect to which a 2019 Repurchase Notice was previously delivered must, instead of complying with DTC withdrawal procedures, complete and sign a notice of withdrawal specifying (i) the principal amount of the Notes with respect to which such notice of withdrawal is being submitted, which portion must be US$1,000 aggregate principal amount or an integral multiple thereof, (ii) the certificate numbers of the Notes in respect of which such notice of withdrawal is being submitted, and (iii) the principal amount, if any, of such Note which remains subject to the 2019 Repurchase Notice, which portion must be US$1,000 aggregate principal amount or an integral multiple thereof, and deliver such manually signed notice of withdrawal to the Paying Agent prior to 5:00 p.m., New York City time, on Thursday, September 12, 2019. (Page 11)

HOLDERS THAT HOLD NOTES THROUGH DTC ACCOUNTS MAY ONLY WITHDRAW THEIR PREVIOUS EXERCISE OF THE PUT RIGHT WITH RESPECT TO SUCH NOTES BY COMPLYING WITH THE TRANSMITTAL PROCEDURES OF DTC AND SHOULD NOT SUBMIT A PHYSICAL NOTICE OF WITHDRAWAL.

Do I need to do anything if I do not wish to exercise the Put Right?

No. If you do not exercise the Put Right before the expiration of the Put Right, we will not purchase your Notes on the 2019 Repurchase Date and such Notes will remain outstanding subject to their existing terms. (Page 6)

If I choose to exercise the Put Right, do I have to exercise the Put Right with respect to all of my Notes?

No. You may exercise the Put Right with respect to all of your Notes or any portion of your Notes. If you wish to exercise the Put Right with respect to a portion of your Notes, you must exercise the Put Right with respect to Notes for a principal amount of US$1,000 or an integral multiple thereof. (Page 6)

If I do not exercise the Put Right, will I continue to be able to exercise my conversion rights?

Yes. If you do not exercise the Put Right, your conversion rights will not be affected. You will continue to have the conversion rights subject to the terms, conditions and adjustments specified in the Indenture and the Notes, as summarized above, under the caption “What are my rights to convert my Notes?” (Page 7)

4

If I exercise the Put Right, will my receipt of cash for Notes with respect to which I exercised the Put Right be a taxable transaction for U.S. federal income tax purposes?

Yes. The receipt of cash for Notes pursuant to the Put Right will be a taxable transaction for U.S. federal income tax purposes. You should consult with your tax advisor regarding the actual tax consequences to you. (Pages 13-14)

Who is the Paying Agent?

The Bank of New York Mellon, the Trustee under the Indenture, is serving as Paying Agent in connection with the Put Right. Its address and telephone number are set forth on the front cover page of this Put Right Notice.

Whom can I talk to if I have questions about the Put Right?

Questions and requests for assistance in connection with the exercise of the Put Right may be directed to the Paying Agent at the address and telephone and facsimile numbers set forth on the cover page of this Put Right Notice.

5

IMPORTANT INFORMATION CONCERNING THE PUT RIGHT

1.    Information Concerning the Company. The Company is a leading provider of online travel and related services, including accommodation reservation, transportation ticketing, packaged tours and in-destination services, corporate travel management, and other travel related services. It enables business and leisure travelers to make informed and cost-effective bookings by aggregating comprehensive travel related information and offering its services through an advanced transaction and service platform consisting of its mobile apps, internet websites and centralized, toll-free, 24-hour customer service center.

The Company was incorporated in the Cayman Islands in March 2000 and its ADSs began trading on the Nasdaq Global Market since December 2003 and the Nasdaq Global Select Market since July 2006 under the ticker symbol “CTRP.” The Company’s principal executive offices are located at 968 Jin Zhong Road, Shanghai 200335, People’s Republic of China and its telephone number is +86 (20) 2233-0000. The Company’s registered office in the Cayman Islands is located at the offices of Maples Corporate Services Limited, P.O. Box 309, Ugland House, Grand Cayman KY1-1104, Cayman Islands.

2.    Information Concerning the Notes. The Notes were issued under the Indenture. The Notes mature on September 15, 2022.

2.1    Interest. The Notes bear interest at the rate of 1.25% per year from September 12, 2016, or from the most recent date to which interest has been paid or duly provided. Interest is payable semi-annually in arrears on March 15 and September 15 of each year, commencing on March 15, 2017, to Holders of record at the close of business on the preceding March 1 and September 1, respectively. The amount of interest payable will be computed on the basis of a 360-day year consisting of twelve 30-day months and, for partial months, on the basis of actual days elapsed over a 30-day month. Unless the Company fails to make the payment of the 2019 Repurchase Price for Notes for which a 2019 Repurchase Notice has been submitted and not properly withdrawn, such Notes will no longer be outstanding and interest on the Notes will cease to accrue on and after the 2019 Repurchase Date.

2.2    The Company’s Obligation to Purchase the Notes. Pursuant to the terms of the Indenture and the Notes, on September 15, 2019, which is the 2019 Repurchase Date, the Company is obligated to purchase all Notes for which the Put Right has been timely exercised and not withdrawn by the Holders. This Put Right will expire at 5:00 p.m., New York City time, on Thursday, September 12, 2019, the Expiration Date, which is the second Business Day immediately preceding the 2019 Repurchase Date. The terms and conditions of the Indenture and Notes require Holders that choose to exercise the Put Right to do so by 5:00 p.m., New York City time, on the Expiration Date, and we do not expect to extend the period that Holders have to exercise the Put Right unless required to do so by U.S. federal securities law. Regardless of whether we extend this period, the Indenture does not provide us with the right to delay the 2019 Repurchase Date, except that the Company may take any action to be taken on the 2019 Repurchase Date on the next succeeding Business Day with the same force and effect as if taken on the 2019 Repurchase Date pursuant to the Indenture because the 2019 Repurchase Date is not a Business Day, and no interest will accrue in respect of the delay. The purchase by the Company of Notes for which the Put Right is validly exercised is not subject to any condition other than such purchase being lawful, the relevant Notes being surrendered and the procedural requirements described in this Put Right Notice being satisfied. You may only exercise the Put Right with respect to Notes in principal amounts equal to US$1,000 or integral multiples thereof.

2.3    Repurchase Price. The 2019 Repurchase Price to be paid by the Company with respect to any and all Notes validly surrendered for repurchase and not withdrawn on the 2019 Repurchase Date is equal to 100% of the principal amount of the Notes, plus any accrued and unpaid interest to, but excluding, September 15, 2019; provided that such accrued and unpaid interest (if any) will not be paid to the Holder submitting the Notes for repurchase on September 15, 2019 but will be paid to the Holder of record as of 5:00 p.m., New York City time, on Sunday, September 1, 2019. Pursuant to the terms of the Indenture and the Notes, on September 16, 2019, which is the next succeeding Business Day after the 2019 Repurchase Date, the Company will pay accrued and unpaid interest on all of the Notes through September 14, 2019, to all Holders who were Holders of record as of 5:00 p.m., New York City time, on Sunday, September 1, 2019, regardless of whether the Put Right is exercised with respect to such Notes. As a result, there will be no accrued and unpaid interest on the Notes on September 15, 2019. The 2019 Repurchase Price will be paid in cash with respect to any and all Notes validly surrendered for repurchase and not withdrawn prior to 5:00 p.m., New York City time, on the Expiration Date.

6

The 2019 Repurchase Price, which will be paid in cash, is based solely on the requirements of the Indenture and the Notes and bears no relationship to the market price of the Notes or the ADSs. Thus, the 2019 Repurchase Price may be significantly greater or less than the market price of the Notes on the 2019 Repurchase Date. Holders are urged to obtain the best available information as to potential current market prices of the Notes, to the extent available, and the ADSs before making a decision whether to exercise the Put Right.

None of the Company, its board of directors or its executive management is making any recommendation to Holders as to whether to exercise the Put Right or refrain from exercising the Put Right. Each Holder must make such Holder’s own decision whether to exercise the Put Right with respect to such Holder’s Notes and, if so, the principal amount of Notes for which the Put Right should be exercised

2.4    Source of Funds. If the Put Right is exercised for any Notes, the Company plans to use its cash balance as of the 2019 Repurchase Date to pay the 2019 Repurchase Price for the Notes, and may arrange short-term loan if the aggregate principal amount of Notes that the Company is obligated to purchase becomes substantial.

2.5    Conversion Rights of the Notes. Subject to and upon compliance with the provisions of the Indenture, a Holder will have the right, at such Holder’s option, to convert all or any portion (if the portion to be converted is US$1,000 principal amount or an integral multiple thereof) of such Note at any time prior to 5:00 p.m., New York City time, Wednesday, September 14, 2022 at an initial conversion rate of 15.2688 ADSs (subject to certain adjustments) per US$1,000 principal amount of Notes. If a Holder has already delivered a Fundamental Change Repurchase Notice or a 2019 Repurchase Notice with respect to a Note, such Holder may not surrender that Note for conversion until the Holder has withdrawn the applicable repurchase notice in accordance with the Indenture. The conversion of your Notes is subject to the provisions regarding conversion contained in the Indenture and the Notes.

Generally, if you exercise the conversion right and the price per ADS is less than the Conversion Price during the relevant observation period, the value of the consideration that you receive in exchange for your Notes will be less than the aggregate principal amount of the Notes. The Conversion Price at any given time is computed by dividing US$1,000 by the applicable Conversion Rate at such time.

2.6    Market for the Notes and the Company’s ADSs. There is no established reporting system or market for trading in the Notes. To the extent that the Notes are traded, prices of the Notes may fluctuate widely depending on trading volume, the balance between buy and sell orders, prevailing interest rates, the Company’s operating results, the market price and implied volatility of the Company’s ADSs and the market for similar securities. As of August 13, 2019, US$975,000,000 in aggregate principal amount of the Notes was outstanding.

The Company’s ADSs into which the Notes are convertible are listed on the Nasdaq Global Select Market under the ticker symbol “CTRP.” The following table sets forth, for the fiscal quarters indicated, the high and low sales prices of the ADSs as reported on the Nasdaq Global Select Market.

7

On August 12, 2019, the closing price of the ADSs on the Nasdaq Global Select Market was US$32.74 per ADS. As of August 12, 2019, there were approximately 15,324,689 ADSs outstanding. We urge you to obtain current market information for the Notes, to the extent available, and the ADSs before making any decision to exercise the Put Right.

2.7    Redemption. Subject to the provisions of the Indenture, the Company may, at its option, on not less than 30 days’ nor more than 60 days’ prior notice, redeem all but not part of the Notes (except in respect of certain Holders that elect otherwise as described in the Indenture) in connection with a change in tax law at a redemption price equal to 100% of the principal amount plus accrued and unpaid interest, if any, to, but not including, the redemption date as described in the Indenture. Upon receiving such notice of redemption, each Holder will have the right to elect to not have its Notes redeemed, subject to the provisions of the Indenture.

2.8    Ranking. The Notes are senior unsecured obligations of the Company, ranking equally in right of payment with all of the Company’s future senior unsecured indebtedness, and senior in right of payment to any of the Company’s future indebtedness that is expressly subordinated to the Notes. The Notes are effectively subordinated to all of the Company’s future secured indebtedness to the extent of the value of the collateral securing those obligations and structurally subordinated to the existing and future indebtedness and other liabilities (including trade payables) of the Company’s subsidiaries and consolidated affiliated Chinese entities.

3    Procedures to Be Followed by Holders Electing to Exercise the Put Right. Holders will not be entitled to receive the 2019 Repurchase Price for their Notes unless they elect to exercise the Put Right by delivering their 2019 Repurchase Notice on or before 5:00 p.m., New York City time, on Thursday, September 12, 2019 and have not withdrawn the 2019 Repurchase Notice prior to 5:00 p.m., New York City time, on Thursday, September 12, 2019. Holders may exercise the Put Right with respect to some or all of their Notes. Any 2019 Repurchase Notice must specify a principal amount of Notes to be purchased by the Company of US$1,000 or an integral multiple thereof. If Holders do not elect to exercise the Put Right, their Notes will remain outstanding subject to the existing terms of the Indenture and the Notes.

3.1    Method of Delivery. The Trustee has informed the Company that, as of the date of this Put Right Notice, all custodians and beneficial holders of the Notes hold the Notes through DTC accounts and that there are no certificated Notes in non-global form. Accordingly, unless physical certificates are issued following the date hereof, all Notes surrendered for repurchase hereunder must be delivered through DTC’s ATOP system. Valid delivery of Notes via ATOP will constitute delivery of a 2019 Repurchase Notice that satisfies such Holder’s notice requirements for its exercise of its Put Right. Delivery of Notes and all other required documents, including delivery and acceptance through ATOP, is at the election and risk of the person surrendering such Notes.

8

HOLDERS THAT HOLD NOTES THROUGH DTC ACCOUNTS MAY ONLY EXERCISE THE PUT RIGHT BY COMPLYING WITH THE TRANSMITTAL PROCEDURES OF DTC AND SHOULD NOT SUBMIT A PHYSICAL 2019 REPURCHASE NOTICE.

3.2    Agreement to Be Bound by the Terms of the Put Right. By exercising the Put Right with respect to any portion of your Notes, you acknowledge and agree as follows:

9

3.3    Exercise of Put Right; Delivery of Notes.

Notes Held Through a Custodian. If you wish to exercise the Put Right with respect to any of your Notes and your Notes are held by a broker, dealer, commercial bank, trust company or other nominee, you must contact such nominee and instruct such nominee to surrender the Notes for purchase on your behalf through the transmittal procedures of DTC as set forth below in “Notes Held by a DTC Participant” on or prior to the deadline set by such nominee to permit such nominee to surrender the Notes by 5:00 p.m., New York City time, on the Expiration Date.

Notes Held by a DTC Participant. If you are a DTC participant who wishes to exercise the Put Right with respect to any of your Notes, you must electronically transmit your acceptance through DTC’s ATOP system, subject to the terms and procedures of that system, on or prior to 5:00 p.m., New York City time, on the Expiration Date.

In exercising the Put Right through ATOP, the electronic instructions sent to DTC by you or by a broker, dealer, commercial bank, trust company or other nominee on your behalf, and transmitted by DTC to the Paying Agent, will acknowledge, on behalf of you and DTC, your receipt of and agreement to be bound by the terms of the Put Right, including those set forth above under 3.2 — “Agreement to Be Bound by the Terms of the Put Right.”

Notes Held in Certificated Non-Global Form. While we do not expect any Notes to be issued to a Holder other than DTC or its nominee in physical certificates after the date hereof, in the event that physical certificates evidencing the Notes are issued to such a Holder, then, in order to exercise the Put Right with respect to such Notes, any such Holder of the Notes must complete and sign a 2019 Repurchase Notice in the form attached hereto as Annex A in accordance with the instructions set forth therein, have the signature thereon guaranteed and deliver such manually signed 2019 Repurchase Notice to the Paying Agent prior to 5:00 p.m., New York City time, on the Expiration Date. For such a Holder to receive payment of the 2019 Repurchase Price for such Notes with respect to the Put Right was exercised, the Holder must deliver such Notes to the Paying Agent prior to, on or after the 2019 Repurchase Date together with all necessary endorsements.

All signatures on a 2019 Repurchase Notice and endorsing the Notes must be guaranteed by a recognized participant in the Securities Transfer Agents Medallion Program, the NYSE Medallion Signature Program or the Stock Exchange Medallion Program (each, an “Eligible Institution” ); provided, however, that signatures need not be guaranteed if such Notes are tendered for the account of an Eligible Institution. If a 2019 Repurchase Notice or any Note is signed by a trustee, executor, administrator, guardian, attorney-in-fact, agent, officer of a corporation or other person acting in a fiduciary or representative capacity, such person must so indicate when signing, and proper evidence satisfactory to the Company of the authority of such person so to act must be submitted.

You bear the risk of untimely surrender of your Notes. You must allow sufficient time for completion of the necessary DTC or Paying Agent procedures, as applicable, before 5:00 p.m., New York City time, on the Expiration Date.

10

4.    Right of Withdrawal. You may withdraw your previous exercise of the Put Right with respect to any Notes at any time prior to 5:00 p.m., New York City time, on Thursday, September 12, 2019, which is the second Business Day immediately preceding the 2019 Repurchase Date.

Except as described below with respect to Notes, if any, for which physical certificates are issued to a Holder other than DTC or its nominee, in order to withdraw your previous exercise of the Put Right, you must comply with the withdrawal procedures of DTC prior to 5:00 p.m., New York City time, on Thursday, September 12, 2019. This means you must deliver, or cause to be delivered, a valid withdrawal request through the ATOP system before 5:00 p.m., New York City time, on Thursday, September 12, 2019.

If after the date hereof physical certificates evidencing the Notes are issued to a Holder other than DTC or its nominee, any such Holder who desires to withdraw any previously surrendered Notes evidenced by physical certificates must, instead of complying with the DTC withdrawal procedures, complete and sign a notice of withdrawal specifying (i) the principal amount of the Notes with respect to which such notice of withdrawal is being submitted, which portion must be US$1,000 aggregate principal amount or an integral multiple thereof, (ii) the certificate numbers of the Notes in respect of which such notice of withdrawal is being submitted, and (iii) the principal amount, if any, of such Note which remains subject to the 2019 Repurchase Notice, which portion must be US$1,000 aggregate principal amount or an integral multiple thereof, and deliver such manually signed notice of withdrawal to the Paying Agent prior to 5:00 p.m., New York City time, on Thursday, September 12, 2019.

In addition, pursuant to Rule 13e-4(f)(2)(ii) promulgated under the Securities Exchange Act of 1934 (the “Exchange Act” ), Holders are advised that if they timely surrender Notes for purchase under the Put Right, they are also permitted to withdraw such Notes on Thursday, October 10, 2019 (New York City time) in the event that we have not yet accepted the Notes for payment as of that time. Pursuant to the Indenture, we are required to forward the appropriate amount of cash required to pay the 2019 Repurchase Price for your Notes to the Paying Agent, prior to 10:00 a.m., New York City time, on Monday, September 16, 2019, which is the next succeeding Business Day after the 2019 Repurchase Date.

You may exercise the Put Right with respect to Notes for which your election to exercise your Put Right had been previously withdrawn, by following the procedures described in Section 3 above. We will determine all questions as to the validity, form and eligibility, including time of receipt, of notices of withdrawal.

You bear the risk of untimely withdrawal of your Notes. You must allow sufficient time for completion of the necessary DTC or Paying Agent procedures by withdrawing before 5:00 p.m., New York City time, on Thursday, September 12, 2019.

5.    Payment for Surrendered Notes. We will forward to the Paying Agent, prior to 10:00 a.m., New York City time, on Monday, September 16, 2019, which is the next succeeding Business Day after the 2019 Repurchase Date, the appropriate amount of cash required to pay the 2019 Repurchase Price for your Notes, and the Paying Agent will promptly distribute the consideration to DTC, the sole Holder of record of the Notes. DTC will thereafter distribute the cash to its participants in accordance with its procedures. To the extent that you are not a DTC participant, your broker, dealer, commercial bank, trust company or other nominee, as the case may be, will distribute the cash to you.

The total amount of consideration required by us to repurchase all of the Notes is US$975,000,000 (assuming all of the Notes are validly surrendered for repurchase and accepted for payment).

6.    Notes Acquired. Any Notes repurchased by us pursuant to the Put Right will be cancelled by the Trustee, pursuant to the terms of the Indenture.

11

7.    Plans or Proposals of the Company. Except as publicly disclosed on or prior to the date of this Put Right Notice, neither the Company nor its directors and executive officers currently has any plans, proposals or negotiations that would be material to a Holder’s decision to exercise the Put Right, which relate to or which would result in:

8.    Interests of Directors, Executive Officers and Affiliates of the Company in the Notes. Based on a reasonable inquiry by the Company:

The Company will not purchase any Notes from its affiliates or the executive officers or directors of the Company. Neither the Company nor any of its associates or majority-owned subsidiaries owns any Notes. During the 60 days preceding the date of this Put Right Notice, neither the Company nor any of its subsidiaries has engaged in any transactions in the Notes.

12

9.    Agreements Involving the Company’s Securities. The Company has entered into the following agreements relating to the Notes:

There are no agreements between the Company and any other person with respect to any other securities issued by the Company that are material to the Put Right or the Notes. The Company is not aware of any agreements between any directors or executive officers of the Company and any other person with respect to any other securities issued by the Company that are material to the Put Right or the Notes.

10    U.S. Federal Income Tax Considerations.

The following discussion is a summary of U.S. federal income tax considerations relating to the exercise of the Put Right by U.S. Holders (defined below) of the Notes. This summary is based upon the Internal Revenue Code of 1986, as amended (the “Code”), the regulations promulgated by the U.S. Treasury Department, current administrative interpretations and practices of the Internal Revenue Service (the “IRS”) and judicial decisions, all as currently in effect and all of which are subject to differing interpretations or to change, possibly with retroactive effect. No assurance can be given that the IRS would not assert, or that a court would not sustain a position contrary to any of the tax considerations described below. This summary is for general information only and does not discuss all aspects of U.S. federal income taxation that may be important to particular holders in light of their individual circumstances, including holders subject to special tax rules (for example, financial institutions, insurance companies, broker-dealers in securities or currencies, traders in securities that elect mark-to-market treatment, partnerships and other pass-through entities and holders of interests therein, pension plans, regulated investment companies, real estate investment trusts, cooperatives, foreign entities treated as domestic corporations for U.S. federal income tax purposes, and tax-exempt organizations (including private foundations)), holders that hold their Notes as part of a straddle, hedge, conversion, constructive sale, or other integrated transaction for U.S. federal income tax purposes, U.S. expatriates and certain former citizens or long-term residents of the United States, U.S. Holders whose “functional currency” is not the U.S. dollar, persons liable for alternative minimum tax, all of whom may be subject to tax rules that differ significantly from those summarized below. This summary is limited to U.S. Holders who hold the Notes as “capital assets” under the Code (generally, property held for investment). In addition, this summary of U.S. federal income tax considerations does not discuss any state, local, or non-U.S. tax considerations, any non-income tax (such as gift or estate tax) considerations, or the Medicare tax on net investment income. Each U.S. Holder is urged to consult its tax advisor regarding the U.S. federal, state, local, and non-U.S. income and other tax considerations relating to the exercise of the Put Right of the Notes.

For purposes of this discussion, a “U.S. Holder” is a beneficial owner of the Notes that is:

13

If a partnership (including an entity or arrangement treated as a partnership for U.S. federal income tax purposes) holds the Notes, the U.S. federal income tax treatment of a partner in such partnership will generally depend upon the status of the partner and the activities of the partnership. If you are a partner of a partnership holding the Notes, you are urged to consult your tax advisor regarding the tax consequences of the exercise of the Put Right.

Sale of Notes Pursuant to the Put Right

Upon exercise of the Put Right, subject to the discussion of market discount below, a U.S. Holder generally will recognize gain or loss equal to the difference between (i) the amount of cash proceeds received on the exercise, and (ii) such U.S. Holder’s adjusted tax basis in the Note. A U.S. Holder’s adjusted tax basis in a Note generally will equal its cost, increased by any accrued market discount if the U.S. Holder has elected to include such market discount as it accrued (as described below), and reduced (but not below zero) by any amortizable bond premium (generally, the excess, if any, of the tax basis of the Note to a U.S. Holder immediately after its acquisition over the principal amount of the Note payable at maturity) allowed as an offset against interest income with respect to the Note. Except to the extent it is subject to the market discount rules discussed below, any gain or loss recognized will be capital gain or loss and will be long-term capital gain or loss if, on the date of the sale, the Note has been held for more than one year. Non-corporate U.S. Holders will generally be eligible for beneficial rates on long-term capital gains. The deductibility of capital losses is subject to limitations. The gain or loss will generally be treated as U.S. source gain or loss for U.S. foreign tax credit purposes.

Market Discount

The Notes have “market discount” if their stated redemption price at maturity (as defined for purposes of the market discount rules) exceeds their tax basis in the hands of a U.S. Holder immediately after their acquisition, unless a statutorily defined de minimis exception applies. Gain recognized by a U.S. Holder with respect to the Notes acquired with market discount generally will be subject to tax as ordinary income to the extent of the market discount accrued during the period the Notes were held by such U.S. Holder, unless the U.S. Holder previously elected to include market discount in income as it accrued for U.S. federal income tax purposes. Market discount is accrued on a ratable basis, unless the U.S. Holder elected to accrue market discount using a constant-yield method. Gain in excess of accrued market discount will be subject to the capital gains rules described above.

Information Reporting

Proceeds of the exercise of the Put Right generally are subject to information reporting unless the U.S. Holder is an exempt recipient.

11.    Additional Information. The Company is subject to the reporting and other informational requirements of the Exchange Act and, in accordance therewith, files reports and other information with the SEC. Such reports and other information can be inspected and copied at the Public Reference Section of the SEC located at Station Place, 100 F Street, N.E., Washington, DC 20549. Copies of such material can be obtained from the Public Reference Section of the SEC at prescribed rates. Such material may also be accessed electronically by means of the SEC’s home page on the Internet at www.sec.gov.

14

The Company has filed with the SEC a Tender Offer Statement on Schedule TO, pursuant to Section 13(e) of the Exchange Act and Rule 13e-4 promulgated thereunder, furnishing certain information with respect to the Put Option. The Tender Offer Statement on Schedule TO, together with any exhibits and any amendments thereto, may be examined and copies may be obtained at the same places and in the same manner as set forth above.

The Schedule TO to which this Put Right Notice relates does not permit forward “incorporation by reference.” Accordingly, if a material change occurs in the information set forth in this Put Right Notice, we will amend the Schedule TO accordingly.

12.    No Solicitation. The Company has not employed any person to make solicitations or recommendations in connection with the Put Right.

13.    Definitions. All capitalized terms used but not specifically defined in this Put Right Notice shall have the meanings given to such terms in the Indenture and the Notes.

14.    Conflicts. In the event of any conflict between this Put Right Notice on the one hand and the terms of the Indenture or the Notes or any applicable laws on the other hand, the terms of the Indenture or the Notes or applicable laws, as the case may be, will control.

None of the Company, its board of directors or its executive management is making any recommendation to any Holder as to whether to exercise the Put Right or refrain from exercising the Put Right pursuant to this Put Right Notice. Each Holder must make such Holder’s own decision whether to exercise the Put Right and, if so, the principal amount of Notes for which the Put Right should be exercised.

CTRIP.COM INTERNATIONAL, LTD.

15

Annex A

FORM OF 2019 REPURCHASE NOTICE

THE BANK OF NEW YORK MELLON, as Trustee

The undersigned registered owner of this Note hereby acknowledges receipt of a notice from Ctrip.com International, Ltd. (the “Company”) regarding the right of Holders to elect to require the Company to repurchase the entire principal amount of this Note, or the portion thereof (that is US$1,000 principal amount or an integral multiple thereof) below designated, in accordance with the applicable provisions of the Indenture referred to in this Note, at the Repurchase Price to the registered Holder hereof.

In the case of certificated Notes, the certificate numbers of the Notes to be purchased are as set forth below:

Certificate Number(s):                                                                                           

A-1

Exhibit (a)(5)

Ctrip Announces Put Right Notification for

1.25% Convertible Senior Notes due 2022

Shanghai, August 14, 2019 — Ctrip.com International, Ltd. (Nasdaq: CTRP) (“Ctrip” or the “Company”), a leading provider of online travel and related services, including accommodation reservation, transportation ticketing, packaged tours and in-destination services, corporate travel management, and other travel-related services, today announced that it is notifying holders of its 1.25% Convertible Senior Notes due 2022 (CUSIP No. 22943F AM2) (the “Notes”) that pursuant to the Indenture dated as of September 12, 2016 (the “Indenture”) relating to the Notes by and between the Company and The Bank of New York Mellon, as trustee and paying agent, each holder has the right, at the option of such holder, to require the Company to purchase all of such holder’s Notes or any portion of the principal thereof that is equal to US$1,000 principal amount (or an integral multiple thereof) for cash on September 15, 2019 (the “Put Right”). The Put Right expires at 5:00 p.m., New York City time, on Thursday, September 12, 2019.

As required by rules of the United States Securities and Exchange Commission (the “SEC”), the Company will file a Tender Offer Statement on Schedule TO today. In addition, documents specifying the terms, conditions and procedures for exercising the Put Right will be available through the Depository Trust Company and the paying agent, which is The Bank of New York Mellon. None of the Company, its board of directors, or its employees has made or is making any representation or recommendation to any holder as to whether to exercise or refrain from exercising the Put Right.

The Put Right entitles each holder of the Notes to require the Company to repurchase all or a portion of such holder’s Notes in principal amounts equal to US$1,000 or integral multiples thereof. The repurchase price for such Notes will be equal to 100% of the principal amount of the Notes to be repurchased, plus any accrued and unpaid interest to, but excluding, September 15, 2019, which is the date specified for repurchase in the Indenture (the “2019 Repurchase Date”), subject to the terms and conditions of the Indenture and the Notes. The 2019 Repurchase Date is an interest payment date under the terms of the Indenture and the Notes. Accordingly, on September 16, 2019, being the business day immediately following the interest payment date, the Company will pay accrued and unpaid interest on all of the Notes through September 14, 2019, to all holders who were holders of record on September 1, 2019, regardless of whether the Put Right is exercised with respect to such Notes. On the 2019 Repurchase Date, there will be no accrued and unpaid interest on the Notes. As of August 13, 2019, there was US$975,000,000 in aggregate principal amount of the Notes outstanding. If all outstanding Notes are surrendered for repurchase through exercise of the Put Right, the aggregate cash purchase price will be US$975,000,000.

The opportunity for holders of the Notes to exercise the Put Right commences today, August 14, 2019, and will terminate at 5:00 p.m., New York City time, on Thursday, September 12, 2019. In order to exercise the Put Right, a holder must follow the transmittal procedures set forth in the Company’s Put Right Notice to holders (the “Put Right Notice”), which is available through the Depository Trust Company and The Bank of New York Mellon. Holders may withdraw any previously tendered Notes pursuant to the terms of the Put Right at any time prior to 5:00 p.m., New York City time, on Thursday, September 12, 2019, which is the second business day immediately preceding the 2019 Repurchase Date, or as otherwise provided by applicable law.

This press release is for information only and is not an offer to purchase, a solicitation of an offer to purchase, or a solicitation of an offer to sell the Notes or any other securities of the Company. The offer to purchase the Notes will be only pursuant to, and the Notes may be tendered only in accordance with the Company’s Put Right Notice dated August 14, 2019 and related documents. Holders of Notes may request the Company’s Put Right Notice from the paying agent, The Bank of New York Mellon.

HOLDERS OF NOTES AND OTHER INTERESTED PARTIES ARE URGED TO READ THE COMPANY’S SCHEDULE TO, PUT RIGHT NOTICE AND OTHER RELEVANT DOCUMENTS FILED WITH THE SEC WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT CTRIP.COM INTERNATIONAL, LTD. AND THE PUT RIGHT.

Materials filed with the SEC will be available electronically without charge at the SEC’s website, www.sec.gov. Documents filed with the SEC may also be obtained without charge at the Company’s website, ir.ctrip.com.

About Ctrip.com International, Ltd.

Ctrip.com International, Ltd. is a leading provider of online travel and related services, including accommodation reservation, transportation ticketing, packaged tours and in-destination services, corporate travel management, and other travel related services. It enables business and leisure travelers to make informed and cost-effective bookings by aggregating comprehensive travel related information and offering its services through an advanced transaction and service platform consisting of its mobile apps, internet websites, and toll-free, 24-hour customer service centers. The family of travel brands mainly includes: Ctrip, a leading provider of online travel and related services in China; Qunar, a leading online travel agency in China; Trip.com, an online travel agency for global consumers; and Skyscanner, a leading global travel search site. The Company has experienced significant growth since its inception in 1999 and become one of the largest travel service providers in the world.

For further information, please contact:

Investor Relations

Ctrip.com International, Ltd.

Tel: +86 (21) 3406-4880 × 12229

Email: iremail@ctrip.com