I signed up for Travelocity's "fare watcher alert", and gave them the details regarding an upcoming trip I was planning. They sent me an e-mail approx. every 3 days, advising me that the price had dropped for my trip, but when I went to their website, I could never find a flight that matched the price they quoted in the e-mail. I finally booked my trip with America West. I have never used them before, but was pleased with their site. After entering the preferred details for your trip, a screen comes up, telling you if you could get a better price by making a change. We saved $20 per ticket by changing our departure from 8 a.m. to 6 a.m., and could have saved even more, if we had been able to fly on Saturday.