Of the 50 largest airports in the U.S., only four showed growth in passenger traffic last year amid the global recession, according to the Department of Transportation's Bureau of Transportation Statistics. Its data include domestic and international flights handled by U.S. airlines but not foreign carriers. San Francisco International was the only airport in the top 20 to eke out an increase in 2009. Its traffic ticked up slightly to 16 million from 15.8 million in 2008, as low-cost carriers, including Virgin America, Southwest and JetBlue, expanded service there.
Airport Check-in: Flier Traffic Falls at Most U.S. Airports