< Corporate Headquarters Pentagon City, Arlington, Virginia Union Station, West Hall, Washington, DC Ronald Reagan National Airport, National Hall Washington Dulles International Airport - Concourse B Washington Dulles International Airport - Concourse C Washington Dulles Interntational Airport - Concourse D Newark Liberty Airport - Terminal C-3 Reagan National Airport, Terminal B South Pier Washington Dulles International Airport, Concourse B Newark Liberty Airport Terminal C-1 Reagan National Airport Terminal A Baltimore Washington International Airport Terminal D Old Town Alexandria Annapolis, MD National Harbor, MD