Baltimore/Washington International Thurgood Marshall Airport (BWI) sits roughly halfway between the two cities, about 30 miles from downtown DC and 10 miles from downtown Baltimore, and serves as Southwest Airlines’ largest East Coast focus city.
A Real Train Station on Site
BWI has its own Amtrak and MARC commuter rail station, connected to the terminal by a short walkway and shuttle, with direct trains to both Washington Union Station and downtown Baltimore, a genuinely different ground transport option from DCA or Dulles.
Often the Value Option
Southwest’s large presence at BWI frequently means lower fares than the same route out of DCA or Dulles, making it worth comparing even if it’s the farthest of the three from downtown DC.
BWI vs. DCA vs. Dulles
Choose BWI if Southwest serves your route or you’re comparing fares across all three airports. Choose DCA for the shortest trip into DC itself. Choose Dulles for international connections.
Search live fares into BWI above.