Domestic travelers paid an average $390 for round-trip flights in the third quarter of 2013, a 5.1 percent increase from a year earlier, Businessweek.com reports. But not all airports are equal — and the ones with a dominant hub airline tend to charge more. Of the five airports with the highest average fares, three are United hubs: Houston-Bush, Washington-Dulles and Newark-Liberty.
via Businessweek
