The links at the top of the Travelocity site convey what it offers: flights, cars, hotels, vacations, cruises, destination guides and deals. In a nutshell, everything you need. Their database gives you access to dozens of airlines and thousands of hotel rooms. It's a great place to start when researching airfares: you can search for specific dates or by destination. Travelocity gets its excellent destination guides from Frommer's, complete with restaurant, sightseeing and best times to go. Membership is free.