Thriftyapp

Last Minute Travel offers hotel, flight, cruises, cars, and vacation packages.  Also, boasts a rewards program and coupons.

Yahoo! Travel offers good rates on hotels and flights among other accommodations.

Cheaptickets.com includes “cheap of the week,” a particularly great travel deals, and lower fees than a number of competitors.

Travelocity.com is an established travel website that has customized deals and business solutions too.