Exhibit 15.1

Our ref KKZ/302248-000002/16449551v2

Direct tel +852 3690 7432

Email Karen.ZhangPallaras@maples.com

Trip.com Group Limited

968 Jin Zhong Road

Shanghai 200335

People’s Republic of China

9 April 2020

Dear Sir and/or Madam

Trip.com Group Limited (the “Company”)

We consent to the reference to our firm under the heading “Taxation” in the Company’s Annual Report on Form 20-F for the year ended December 31, 2019, which will be filed with the Securities and Exchange Commission in the month of April 2020 and further consent to the incorporation by reference of the summary of our opinion under this heading into the Company’s registration statement on Form S-8 (No. 333-116567, No. 333-136264, No. 333-146761, No. 333-218899 and No. 333-230297) that were filed on June 17, 2004, August 3, 2006, October 17, 2007, June 22, 2017 and March 15, 2019, respectively, and into the Company’s registration statement on Form F-3 (No. 333-233938) that was filed on September 25, 2019.

Yours faithfully

/s/ Maples and Calder (Hong Kong) LLP

Maples and Calder (Hong Kong) LLP