Flying into Washington Dulles Airport and Getting to Baltimore

Hey, It's a fuck load cheaper for me to fly into Washington than Baltimore so does anyone know if it's straight-forward to fly into Washington Dulles airport and get to Baltimore from there using a train or some other kind of public transport? A quick Google search makes it look do-able but would appreciate some real life knowledge. Cheers

If youre in DC, you can take the MARC train that runs to Baltimore. I've done that before, its cheap and simple.