Photojournalist Jeremy Harlan frequently flies in and out of airports across the country as part of CNN's team. He put together an article listing his favorite foods at airports from Albuquerque to Washington, DC.
Here is the excerpt on the DC airports:
"Dulles and National are my base airports. Five Guys hamburger chains have exploded across the country, but the first store was in northern Virginia, so Dulles and National can both claim it as their own. The Terminal A location in Dulles provides a welcome respite en route to the far-outlying gates of the United regional flights. At National, look for it tucked around the left-corner on Concourse A. Their bacon cheeseburgers are tough to beat."
Also included in the list are Chick-Fil-A's waffle fries at Atlanta (a personal fave of mine), the chi-dogs at Reggio's at Chicago, barbecue at Intereste BBQ at Memphis, and tamales from El Bravo at Phoenix.