From Virginia:
Richmond and Points South:
I-95 North to I-395 North. take Exit 10 (GW Parkway South); take Airport Exit
Manassas and Points West:
I-66 East; Route 110 South to Route 1 South; take Airport Exit
From Maryland:
Baltimore and Prince George's County:
I-95 South over Woodrow Wilson Bridge; Route 1 North; take Airport Exit
Frederick & Montgomery Counties:
I-270South; I-495 South; take GW Parkway South; take Airport Exit
From Washington, DC:
I-395 South; GW Parkway South; Take Airport Exit