Originally Posted by
Quaker325
This is all good advice. I'll add that the B30 bus costs ~$2/person; MARC about $6/person; Amtrak between $12-19, depending on the time.
Just one word of caution on the Amtrak. Make sure you do not sign up for the Acela or the Metroliner from BWI to WAS. That will cost you $36 instead of the $16. I only now of one Amtrak train from BWI for $12, and that is the one that leaves BWI at 9:11 AM.
You can find the schedule for MARC's Penn line (from BWI to WAS) here:
http://www.mtamaryland.com/services/...0for%20web.pdf
Hope that helps!!!