Vayama

Vayama.com specializes in finding the best fares for international flights to 190 countries (you can also find fares on domestic flights). Reviewers praise this site's easy-to-use tools, which let you either type in cities or click on a world map, and there are helpful links to information about visas, passport requirements and health advisories, as well as excellent tools for getting around in your destination city, such as public transport options and prices for getting from the airport into the city. Booking fees vary by destination from $10 to $20. Right now, you can't search for hotels on this site; for that information, experts say, you're better off visiting Priceline.com or Kayak.com.

Vayama.com is a relatively new travel site; its beta-version website is tested in depth by IndependentTraveler.com. This site is also listed in an overview of travel sites by USA Today.