Priceline.com - This was one of the First great cheap airline ticket sites online. Their famous YOU NAME THE PRICE method is a great tool for finding a discount airtravel. You need to be sure you read the terms and conditions of the deal. Remember if they accept your bid your flying on the tickets / airlines they decide to put you on. Discount Airline Tickets from priceline.com!

Expedia.com - They Offer a solid interface for finding a discount airfare online. All the major travel sites use the same databases to get their airfares. So one site might be more useful to you than another. On Expedia use their Flight Reservation Wizard and watching their Discount Tickets & Promotions page you can find some cheap flights. Make sure you check out Expedia

Travelocity - Similar to Expedia in many ways, but different. Their site allows you to compare fares to find the cheapest discount airline travel. Check the featured deals page for money saving discounts. Try Travelocity.com