Expedia is an online travel agency that reaches over seven million viewers a month, comprised primarily of United States users. The service includes airline reservations, hotels reservations, car rentals, cruises, and vacation packages. The website is owned by Expedia Inc, a publicly traded company on NASDAQ that includes hotels.com, hotwire.com and a variety of other travel based agencies and corporations.

Users can search for airline, hotel and car reservations based on departure and arrival dates. The site also includes a handy calendar interface for estimating departure and arrival dates. Users can also filter results based on airline accommodations (such as first class or coach), hotel ratings, and can swap parts of any given package, such as accepting the airline and hotel part of a package but switching the rental car provider for another provider. Users who are uncertain of their travel plans can purchase insurance that grants a full refund in case of cancellation. Upon accepting a given package, the website also offers a variety of convenience options for travel tours, popular attractions, and theme parks located in or around the area.

Users do not need to sign-up for an account to use the search capabilities of the website but do need to have an account to book any reservation found. Account holders can also save their past, present and future itineraries, receive bonus points that can be redeemed for future travel and receive coupons towards future purchases.