Originally Posted by
paytonc
The way that Maryland highways are set up, it's much easier for passengers from both nearby suburbs and from outlying cities (Annapolis, Frederick) to reach BWI than either Washington Union or Baltimore Penn.
To say nothing about parking !!!
Mrs Bob H and I used to live in Rockville. MD and preferred to fly out of BWI.
Also, it sometimes is cost effective to fly to BWI and take Amtrak to PHL -- particularly if you're going to Center City.
Bob H