QuickLinks -- Click here to rapidly navigate through this document
Exhibit 23.4
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in the Registration Statement (Post-Effective Amendment No. 2 on Form S-8 to Form S-4) of IAC/InterActiveCorp of our report dated April 1, 2005, with respect to the consolidated financial statements of TripAdvisor, Incorporated included in Amendment No. 2 to the Registration Statement (Form S-4 No. 333-124303) and related Proxy Statement/Prospectus of IAC/InterActiveCorp and Expedia, Inc., filed with Securities and Exchange Commission.
/s/ Ernst & Young LLP
Boston, Massachusetts
August 8, 2005
Consent of Independent Registered Public Accounting Firm