Air Station

The Washington, D.C. airport was an airport before the Great War, only referred to generically as "air station."

Background
Sometime after the bombs fell, a group of people trying to gain entry to Vault 101 used the scrap from the planes and buildings at the airport as building materials to create the town of Megaton. According to Manya Vargas, the airport was not far from the town. Over time, the rest of the airport was reclaimed by nature and no sign of its existence remains.

Appearances
The Washington, D.C. airport is mentioned only in Fallout 3.