November 4, 2007 3:01 AM

Comparing online fare alerts

travel site these days purports to offer a system that tracks airfares and signals you when a fare matches your ballpark price. Sounds wonderful. But can these alerts replace the proven system of poking around the Internet on multiple sites before settling on -- and booking -- the right flight? We tested five popular sites, and while some perform better than others, there was one overriding result: We'd use them to save time and point us in the right direction, yet none could totally replace a few...

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