Exhibit 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statement Nos. 333-91639, 333-91631, 333-91623, and 333-65138 on Form S-8 and No. 333-51146 on Form S-3 of our report dated July 27, 2001, appearing in this Annual Report on Form 10-K of Expedia, Inc. for the year ended June 30, 2001. /s/ Deloitte & Touche LLP Seattle, Washington August 17, 2001