(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO § 240.13d-1(a) AND AMENDMENTS THERETO FILED

PURSUANT TO § 240.13d-2(a)

Under the Securities Exchange Act of 1934
(Amendment No. 6)*

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)

(Date of Event Which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. o

Note. Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See § 240. 13d-7 for other parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

* Includes the 10,544,200 ADSs purchased by Purchaser pursuant to the Priceline Purchase Right and the 8,542,950 ADSs issuable upon conversion of the 2015 Convertible Note and the Convertible Note, as described herein. See Item 5.

** Based on 37,782,041.5 outstanding Ordinary Shares, after giving effect to the transactions described in Item 4. See Item 5.

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* Includes the 10,544,200 ADSs purchased by Purchaser pursuant to the Priceline Purchase Right and the 8,542,950 ADSs issuable upon conversion of the 2015 Convertible Note and the Convertible Note, as described herein. See Item 5.

** Based on 37,782,041.5 outstanding Ordinary Shares, after giving effect to the transactions described in Item 4. See Item 5.

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This Amendment No. 6 (this “Amendment No. 6”) amends that certain statement on Schedule 13D filed by The Priceline Group Inc., a Delaware corporation (“Priceline”), and Priceline Group Treasury Company B.V., a Netherlands company and an indirect wholly owned subsidiary of Priceline (“Purchaser,” and together with Priceline, the “Reporting Persons”), with the Securities and Exchange Commission (“SEC”) on September 29, 2014 (the “Original 13D”), as amended and supplemented by Amendment No. 1 to the Original 13D filed with the SEC on October 10, 2014 (“Amendment No. 1”), Amendment No. 2 to the Original 13D filed with the SEC on October 20, 2014 (“Amendment No. 2”), Amendment No. 3 to the Original 13D filed with the SEC on November 5, 2014 (“Amendment No. 3”), Amendment No. 4 to the Original 13D filed with the SEC on May 29, 2015 and Amendment No. 5 to the original 13D filed with the SEC on September 15, 2015 (together with the Original 13D, Amendment No. 1, Amendment No. 2, Amendment No. 3 Amendment No. 4 and this Amendment No. 6, the “Schedule 13D”), relating to the American Depositary Shares (“ADSs”), each representing 0.25 ordinary shares, par value $0.01 per share (the “Ordinary Shares”), of Ctrip.com International, Ltd., a Cayman Islands exempted company (the “Issuer”). Except as specifically provided herein, this Amendment No. 5 does not modify any of the information previously reported in the Schedule 13D. Capitalized terms used but not defined herein have the meanings ascribed to them in the Schedule 13D.

Item 3.                                           Source and Amount of Funds or Other Consideration.

The second sentence of the second paragraph of Item 3 of the Schedule 13D is hereby amended and restated as follows:

As of October 15, 2015, since August 7, 2014, Purchaser has made open market purchases of ADSs totaling $630,514,593.58 pursuant to a purchase plan established pursuant to Rule 10b5-1 under the Exchange Act (the “10b5-1 Plan”).   The funds used to purchase these ADSs pursuant to the Priceline Purchase Right were obtained from the general working capital of Purchaser.

Item 5.                                           Interest in Securities of the Issuer.

(a), (b) The first sentence of the second paragraph of Items 5(a) and (b) of the Schedule 13D is hereby amended and restated as follows:

As of October 15, 2015, each of the Reporting Persons beneficially owns or may be deemed to beneficially own, as the case may be, 19,087,150 ADSs, including the 10,544,200 ADSs purchased by Purchaser pursuant to the Priceline Purchase Right and the 8,542,950 ADSs issuable upon conversion of the Convertible Notes, representing 4,771,787.5 Ordinary Shares or approximately 12.63% of the outstanding Ordinary Shares.

(c) The table contained in Item 5(c) of the Schedule 13D is hereby amended and supplemented by adding the following rows (but not the column headings, which are included herein for reference only) to the bottom of the table:

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SIGNATURES

After reasonable 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.

Date: October 19, 2015

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