AIRFARE WATCHDOG offers their own search engine and provides a daily list of fares on all airlines.  Uniquely, Airfarewatchdog uses people to search the routes daily and verifies that the routes are truly available. Throughout the website, they provide insider tips on how to find more low deals. This travel site also allows you to search by departure city and provides fares from nearby alternate airports. They even watch the airfares for you and notify you when prices drop.