<Page> EXHIBIT 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in the Registration Statements of USA Networks, Inc. and Expedia, Inc. on Forms S-4 of our report dated July 27, 2001, appearing in the Annual Report on Form 10-K of Expedia, Inc. and subsidiaries for the year ended June 30, 2001 and to the reference to us under the heading "Experts" in the Prospectus, which is part of these Registration Statements. /s/ Deloitte & Touche LLP DELOITTE & TOUCHE LLP Seattle, Washington August 17, 2001.