Baltimore has a lot to offer the LGBT visitor and is often ignored due to the proximity to its neighbor, Washington, D.C.
However, Baltimore is a real city and a historical one at that, having been founded in 1729. There’s lots to see and it’s very walkable. Like many cities these days, you do have to be on guard and stay on certain streets.
The L Line light rail from the airport to downtown takes 30 minutes and is just $1.85.
You will find the Link L light rail station at the northern end of the terminal.
BWI Airport is a Southwest hub so there are lots of cheap air fares on all the airlines. You can also take Amtrak to Baltimore or even BWI. MARC and Amtrak trains can bring you up from D.C. if you want to visit both cities or even continue on up to Philadelphia or New York.