airfare
Cheap Airline Tickets, Discount Hotels and Airfare - Si ... 
>30 days ago by saldb2, 3 Users, more info saveBest Sites for Cheap Flights: Tips for Finding the Lowe ...
>30 days ago by a1mega, 4 Users, more info saveExpedia Travel: Cheap Airfare
travel tickets, etc
26 days ago by maggieagosto, 31 Users, more info saveMileMaven.com: Earn the Most Miles on Every Trip
>30 days ago by ZoomInfinite, 2 Users, more info saveExpedia Travel: Cheap Airfare, Hotels, Car Rental, Vaca ...
>30 days ago by ChrisH, 6 Users, more info saveTake Control of Booking a Cheap Airline Ticket
Great tips! (I'm quoted, so I'm only slightly biased)
>30 days ago by Bren, 1 User, more info saveSeatCounter - The Booking Class Availability Machine
like farecast... more of a craigslist interface
>30 days ago by aerickson, 1 User, more info save