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Orbitz is a travel site brought to you by the Worlds Leading Airlines. Orbitz was designed with the traveler in mind, and gives you access to what we think is the largest selection anywhere of low fares and rates on airline tickets, rental cars, hotels, vacation packages, and other travel products.

The mission of Hotwire is to offer flexible leisure travelers a quick and easy way to get better deals on airline tickets, hotel reservations and car rentals. Through partnerships with leading travel companies, Hotwire can negotiate special prices -- Hot-FaresSM and Hot-RatesSM -- that cannot be found anywhere else.

Travelocity.com is a one-stop travel site providing secure online reservation capabilities for air, car, hotel and vacation reservation, plus access to a vast database of destination and other travel information. Through the SABRE system, Travelocity.com offers schedules for more than 700 airlines; reservations and tickets for more than 400 airlines; and reservations and purchase capabilities for more than 34,000 hotels and 50 car rental companies.

In terms of search features, the number of hotels represented, and extras, Expedia.com rules.

Priceline.com is a simple, yet powerful buying service that allows consumers to get big savings on airline tickets, hotel rooms, rental cars, new cars and more.

Delta Air Lines is not only the most traveled airline in the world, carrying 117 million passengers last year, it is also one of the leading airline Web sites, totaling well over $1 billion in sales