Kayak.com announced the launch of its travel comparison shopping website after four months of beta testing. Kayak.com is the first travel search engine to integrate user-created reviews, ratings and other relevant travel information with real-time prices and availability.

Co-founders of Orbitz, Expedia and Travelocity created Kayak.com. The site accesses over 100 online travel sites, providing prices and itineraries for more than 550 airlines and 85,000 hotels.

Kayak.com enables users to refine their search criteria, see immediate results and filter through hundreds of fares/rates and flight/hotel options. Consumers can also use Kayak-branded interactive sliders to filter prices or flight schedules.

"Online travel has quickly become a $55 billion industry, but the fact remains that most consumers are frustrated by having to look at dozens of sites to find the best deals or itineraries," says Steve Hafner, chief executive officer, Kayak.com.

Kayak.com also announced a distribution partnership with USATODAY.com. Under terms of the agreement, Kayak.com will operate a co-branded travel price comparison tool accessible to visitors to the site.

"We are thrilled to add new partners to Kayak.com's growing affiliate network. Not only will visitors to USATODAY.com Travel benefit from Kayak.com's advanced travel search engine, but Kayak.com's travel suppliers will receive greater exposure to more consumers -- it's a win-win situation for everyone," says Keith Melnick, vice president, business development, Kayak.com.