Have you read……..
10 Ways to Cut Your Travel Costs This YearPublished: January 10, 2010New York Times – Travel Section
Airlines have long offered to refund the difference in their fares (minus a change fee) in the form of a voucher to customers who ask. Using your confirmation number, Yapta.com will automatically track the price of your ticket, taking the airline’s fees into consideration, and send you, without charge, an e-mail message or Twitter alert notifying you of the lower price. You can then call the airline to claim the credit.
Similarly, Travelocity.com promises to refund the difference in price for prepaid hotel reservations if you find the same room for a cheaper rate online before check-in.