I recently had an early flight out of Dulles Airport, and wanted breakfast in the terminal. I've had some pretty bad breakfasts at airports in the past, so I was looking for something different. To my surprise Five Guys was open and offering a breakfast menu.
I had a bacon, egg and cheese sandwich and coffee. It was actually pretty good. They made the bacon and eggs fresh for each order, and the cheese was the same as what they use on their cheeseburgers. The only thing I would change would be the bun. They used their hamburger buns, which were a good size, but too soft for a breakfast sandwich, or maybe I'm just used to English muffins.
I'm not sure what kind of coffee they served, but it was good also.
So, if you're ever at Dulles Airport in DC at breakfast time, and don't want the usual microwaved breakfast food, give them a try.