Getting from IAD to Washington

[Eboy]

There is also the Super Shuttle. I have never used it. It is run by the same people that run the Washington Flyer taxi and bus service. It would be priced between a taxi and the bus.

SUPERSHUTTLE - Airport Shuttle | Airport Transfer | LAX SFO DEN PHX DFW TPA JFK BWI IAD SAN DCA SMF MCI IAH LGA MSP EWR AUS SNA HOU BUR DAL OAK BNA ONT LGB RDU SJC AZA ISP PTP PIE CDG ORY BVA Airports

If you take the bus to the Metrorail station, dress appropriately. You could be standing for up to 15 minutes or so on an outdoor platform waiting for the train.