Dulles International Airport (IAD)
This international transit hub, which opened in 1962, is Washington, D.C.’s busiest airport, servicing some 22 million passengers every year who are heading to one of at least 125 destinations across the globe. Dulles is a hub for United Airlines and the third largest carrier for American Airlines.
The airport has one major terminal and two midfield terminals, which include Concourses A/B and C/D. All non-United flights and a majority of international ones operate out of the 47-gate Concourse A. Hungry travelers are sure to find exactly what they crave with more than 100 privately-owned restaurants and shops to choose from, and frequent fliers can relax in one of the 30 airline lounges—perfect for relaxing during an extra-long layover.