BWI Light Rail to the Airport

The East Coast trip went differently than planned and I wound up at Dulles on the way out, but on my return via Baltimore I took bus and light rail right into the Airport. The light rail (and I think Marc Trains as well) deliver you to the terminal, so if you can get to Light rail via bus you are looking at a 1.60 fair to the Airport from most Baltimore locations. At about 90 minutes this is probably somewhat longer than Shuttle times, but I doubt by too much.