ALLEGHENY COMMUTER (AL*)
Aircraft Operated:
De Havilland Canada DHC-6 Twin Otter, Shorts 330
Cities Served:
Clarksburg, Pittsburgh
UNITED EXPRESS (OPERATED BY PRESIDENTIAL AIRWAYS) (UA/XV)
Aircraft Operated:
British Aerospace Jetstream 31
Cities Served:
Clarksburg, Washington Dulles, Washington National
