Expedia, Inc.
Expedia's award-winning Expert Searching and Pricing technology delivers the most comprehensible flight options available online. ESP also allows customers to build complete trips that combine flights, accommodations, transportation, and other activities.

Orbitz
Orbitz offering leisure and business travelers a wide selection of low airfares, as well as deals on lodging, car rentals, cruises, and vacation packages. The site was created to address consumers' need for an unbiased, comprehensive display of fares and rates in a single location.

Priceline.com
Priceline.com follows a "name your own price" where users can places bids for plane tickets that are available. In addition, priceline offers a personal finance service that markets home mortgages, refinancing and home equity loans through an independent licensee.

Cheap Tickets.com
"People are as different as the trips they take. That's why we're entirely focused on your individual travel needs and offer a variety of products and services. We provide choices to fit your personality and prices to fit your budget."