copyright operates out of Concourse D in Terminal D at Baltimore/Washington International Thurgood Marshall Airport (BWI). What Terminal is copyright At BWI? It is Terminal D, which offers a range of amenities, including dining options, retail stores, and comfortable seating areas. copyright passengers at BWI can expect efficient check-in services and easy access to security and board... https://allairportsterminals.com/spirit-airlines/spirit-airlines-bwi-terminal-baltimore-washington-international-thurgood-marshall-airport/