Concourses A, B and C (Checkpoints A, B and C)
Southwest is the anchor here, with American and Contour. The airport map lists Southwest entering through Checkpoint A, B or C depending on the gate.
Baltimore/Washington International Thurgood Marshall Airport (BWI) terminal guide
Baltimore, Maryland KBWI #26 US airport by passengers
How BWI is laid out and how to move between buildings.
Terminals at BWI
Concourses D and E (Checkpoint D/E)
United, Delta, Frontier, Spirit, Sun Country, Alaska, Air Canada, Avelo, Allegiant, JetBlue and other carriers use this side. The Chesapeake Lounge is here.
Ticketing and baggage claim
Airline ticket counters and baggage claim are on the upper level of the main terminal. Curbside check-in is available with several airlines.
Moving between terminals
The A/B/C and D/E sides are both on the same terminal map. The airport map does not make it clear how far the walk is, so check the terminal map before you go, and leave extra time if you are switching sides.
Reviewed October 8, 2026. Confirm details on the official airport website. Spotted a change?
Frequently asked questions
Can I walk between the two sides of the terminal?
The airport map shows both sides on one terminal. Check the terminal map for the walking route before you go, because the distance between the sides is significant.