If you havent racked up the level of credit-card bonuses that Huang has, there are other ways to get cheap fares. He recommends Googles Matrix Airfare Search . The search flexible dates options on other sites can be basic, he says, and give a range of plus or minus three days. But this Google-powered option allows users to choose from a calendar of lowest fares, as well as specify a date range and different airports within driving distance. Instead of a range of a few days, the search tool can look up every single flight combination for up to 30 days, Huang tells The Post. On Southwest , Huang

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