As a Washington, DC based traveler I have the choice of three airports for my travel. While I prefer Reagan National I do sometimes end up flying out of BWI. When I fly out of Baltimore I try to leave myself enough time to stop in the AirSpace Lounge. It's located in BWI's D Concousre. This is the concourse that serves Delta, JetBlue, Cape Air, United, and US Airways. What's great about the lounge is that it's not airline specific.