Originally Posted by
The Man in Seat 9A
Amtrak serves EWR-BWI airport to airport, 7x daily, from $37. Yes it's 2.5 hours, but United blocks EWR-DCA at 1:25 so the train seems like a decent alternative. YMMV.
I have done both and would like more BWI service. Once I was going from the Eastern shore to AMS so flying from BWI-EWR and connecting made sense. Another time I was doing LHR-EWR-BWI and the transatlantic was so bumpy and I was airsick, so I hopped the train instead, and since I was going north of Baltimore, getting off at Penn station saved time as well as having to fly on one of those old nasty Q200 Dash 8s. But I miss having the option. Have never done DCA-EWR-BOS or anything like that. I drive to Dulles (not at peak times) or bite the bullet and fly AA or B6 (the latter is also pulling out of BWI).