Southwest Airlines BWI Terminal is based at Baltimore/Washington International Thurgood Marshall Airport (BWI) at Terminal A Passengers can check in, go through security, and board their flights with ease thanks to this terminal, which is only for Southwest airlines. A number of facilities are available in Terminal A, such as restaurants, shops, and cozy seating places. Free Wi-Fi, charging stations, and other amenities are also available to travelers to enhance their convenience. Terminal A at BWI guarantees a seamless and effective travel experience with Southwest Airlines, whether you're traveling for business or pleasure.