Join Date: Oct 2002
Location: Belmont, VA USA
Programs: Marriott Gold, HH Gold, AA Gold, UA3P, DL proletariat, proud Costco Executive member
Posts: 717
DCA is by far the most convenient. You can be in Foggy Bottom by Metro in under 20 minutes. Either Dulles or BWI are good alternatives, taking the Washington Flyer bus from Dulles to the West Falls Church metro, or the frequent MARC trains from BWI to Union Station, where you can connect to the Metro.
Good luck
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Missing the Wings of Man, Whisperliners, and the overall civility in air travel!