Small airports (many providing service mostly or exclusively to private planes) make out like bandits from federal fees attached to everyone's plane ticket prices. This Washington Times report quotes Reason Foundation director of trasportation studies (and former editor of reason) Robert Poole:
"They're making out like bandits," said Bob Poole….author of several studies on air transportation costs. "It's not only that airline passengers are paying more than their fair share, but they're being overtaxed to give private jets a free ride.
The full article has a detailed list of various small airports around the country and the full amount of subsidies they are receiving from the rest of us.
A collection of Poole's airport-related work for the Reason Foundation.