Get Money If Air Ticket Price Changes

Yapta is a new service that tracks the price of your already purchased airline tickets. There's an unpublicized rule with the airline carriers that says if your existing ticket can be bought for a lower price, you are entitled to money back. Yapta will monitor your airline reservations through services like Expedia or Travelocity and then notify you if it finds the reservation price has dropped. It's then up to you to contact the airlines.