I can get to DCA, IAD, and BWI in about the same time. I primarily fly UA. DCA is preferred as I prefer the views and the UC. IAD comes in 2nd, primarily for international. BWI - I simply don't like it. I like to fly, so a connection required by DCA does not bother me. In addition, if I have an early AM flight, I'm staying in a local hotel.

I would like to see WMATA (Metro) do have some program for long-term parking at the Metro stations with parking (yes, a few, I think 4 have it, but none convenient to me). Even with a small checked bag, I wouldn't mind using the Silver line out to IAD.