Exhibit 15.3

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-116567, No. 333-136264, No. 333-146761, No. 333-218899, No. 333-230297 and No. 333-257784) of Trip.com Group Limited of our report dated April 11, 2025 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 20-F.

/s/ PricewaterhouseCoopers Zhong Tian LLP

Shanghai, the People’s Republic of China

April 11, 2025