UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of December 2018

Commission File Number: 001-33853

CTRIP.COM INTERNATIONAL, LTD.

968 Jin Zhong Road

Shanghai 200335, People’s Republic of China

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F  x          Form 40-F  o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): o

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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EXHIBIT INDEX

3

Exhibit 99.1

Ctrip to Hold 2018 Annual General Meeting on December 20, 2018

Shanghai, December 06, 2018 - Ctrip.com International, Ltd. (Nasdaq: CTRP), a leading travel service provider of accommodation reservation, transportation ticketing, packaged tours and corporate travel management in China (“Ctrip” or the “Company”), today announced that it will hold its 2018 annual general meeting of shareholders at Building 16, Sky SOHO, 968 Jin Zhong Road, Shanghai 200335, People’s Republic of China, at 09:30 Shanghai/Hong Kong Time on December 20, 2018. No proposal will be submitted to shareholders for approval at the meeting. Instead, the meeting will serve as an open forum for shareholders and beneficial owners of the company’s American depositary shares (“ADSs”) to discuss company affairs with management. Holders of record of ordinary shares of the company at the close of business on December 10, 2018 are entitled to receive notice of and attend the annual general meeting or any adjournment or postponement thereof in person. Beneficial owners of the company’s ADSs are welcome to attend the meeting in person.

The notice of the annual general meeting is available on the Investor Relations section of the company’s website at http://ir.ctrip.com. Ctrip has filed its annual report on Form 20-F, including its audited financial statements for the fiscal year ended December 31, 2017, with the U.S. Securities and Exchange Commission. Ctrip’s Form 20-F can be accessed on the above-mentioned website, as well as on the SEC’s website at http://www.sec.gov. Shareholders and ADS holders may request a hard copy of the company’s annual report, free of charge, by contacting Investors Relations Department, Ctrip.com International, Ltd., Building 16, Sky SOHO, 968 Jin Zhong Road, Shanghai 200335, People’s Republic of China, or by email to iremail@ctrip.com.

About Ctrip.com International, Ltd.

Ctrip.com International, Ltd. is a leading travel service provider of accommodation reservation, transportation ticketing, packaged tours, and corporate travel management in China. It is the largest online consolidator of accommodations and transportation tickets in China in terms of transaction volume. Ctrip 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. Ctrip also helps customers book vacation packages and guided tours. In addition, through its corporate travel management services, Ctrip helps corporate clients effectively manage their travel requirements. Since its inception in 1999, Ctrip has experienced substantial growth and become one of the best-known travel brands in China.

For further information, please contact:

Investor Relations

Ctrip.com International, Ltd.

Tel: (+86) 21 3406 4880 X 196455

Email: iremail@ctrip.com

Exhibit 99.2

CTRIP.COM INTERNATIONAL, LTD.

(Incorporated in the Cayman Islands with limited liability)

(Nasdaq Ticker: CTRP)

NOTICE OF ANNUAL GENERAL MEETING

To be held on December 20, 2018

NOTICE IS HEREBY GIVEN that an annual general meeting (the “AGM”) of Ctrip.com International, Ltd. (the “Company”) will be held at Building 16, Sky SOHO, 968 Jin Zhong Road, Shanghai 200335, People’s Republic of China, on December 20, 2018 at 09:30 Shanghai/Hong Kong Time. No proposal will be submitted to shareholders for approval at the AGM. Instead, the AGM will serve as an open forum for shareholders and beneficial owners of the Company’s American depositary shares (“ADSs”) to discuss Company affairs with management.

The Board of Directors of the Company (the “Directors”) has fixed the close of business on December 10, 2018 as the record date (the “Record Date”) for determining the shareholders entitled to receive notice of the AGM or any adjournment or postponement thereof.

Holders of record of our ordinary shares at the close of business on the Record Date are entitled to attend the AGM and any adjournment or postponement thereof in person.  Beneficial owners of the Company’s ADSs are welcome to attend the AGM in person.

Shareholders and ADS holders may obtain a copy of the Company’s annual report on Form 20-F, free of charge, from our website at http://ir.ctrip.com, or by writing to Investors Relations Department, Ctrip.com International, Ltd., Building 16, Sky SOHO, 968 Jin Zhong Road, Shanghai 200335, People’s Republic of China, or by email to iremail@ctrip.com.