What terminal is Southwest Airlines at BWI refers to the question of which terminal Southwest Airlines operates from at Baltimore/Washington International Thurgood Marshall Airport (BWI). The answer to what terminal is Southwest Airlines at BWI is Terminal A. Southwest Airlines primarily uses Terminal A for its flights at BWI, offering passengers check-in services, baggage claim, secu... https://airlineofficedetails.com/southwest-baltimore-washington-airport-terminal-bwi/