Metrobus 5a (DC-Dulles Airport)
19th St N
Arlington, VA 22209
The 5A Bus takes visitors from the Rosslyn Metro Station right to the front of the main terminal of Dulles airport (IAD). Aside from a quick stop at a Park & Ride lot as it nears Dulles, this is your most direct public transit option and reliably gets you to the airport in under 45 minutes. Check out the 5A bus timetable here.
The fare is $7.50 for this express service, payable by SmarTrip or cash. When traveling from Dulles, prepare your payment as there are no SmarTrip card stations at the airport.