Originally Posted by
sydneyracquelle
Where will you be living in DC? DCA is incredibly convenient but IAD and BWI are quite a distance away from the city center. IAD is great for UA and *A. BWI is great for SW. A new train now goes out to IAD.
The OP has to start with an airport preference. Rare is the flyer that could find BWI/DCA/IAD equally convenient.