Baltimore Washington Airport (BWI) Terminal Map

Baltimore/Washington International Airport – here referred to as ‘BWI’ Airport – has a two-level Main Terminal, shaped like a horseshoe, which surrounds the parking & transportation facilities in the center, and Concourses A to E surrounding it on the outside. The underground tunnel connects the hourly parking garage with the Main Terminal, and Skywalks A through E from level 6 of the garage connect to concouses (for Concourse C use Skywalk B or D, or the tunnel), and level 5 of the garage connects by Skywalk E to the international concourse E. 
A new 9-lane security checkpoint now serves Concourses C, B & A.

NOTE: (a) Construction at B/C Connector and C Concourse will continue throughout the summer, as well as enhancements to Concourse C.

If you arrive at the Airport by Light Rail service you arrive at the Main Terminal's lower level, outside international arrivals.
If taking the ICC Bus Route 201 from the Gaithersburg Park & Ride Lot at I-270 & MD 124, the 201bus stops at Concourses A (Southwest Airlines) and E (International terminal), dropping off passengers on the upper level and picking up passengers on the lower level. (The route terminates at the BWI Rail Station.)

Getting Around:  1. No shuttle services are needed between the Main Terminal and the Concourses.  Unless you arrive on an international flight, you can proceed to your next Concourse and gate.  Note that there is now a  secure connector between Concourses A, B & C, referred to as the B/C Connector (construction of which will continue throughout the summer).
2. International arrivals are at Concourse E. Unless you have gone through US customs clearance by participating airports in Canada and the Caribbean, you need to go through passport check, retrieve checked bags, go through customs clearance and - if transferring to another flight - re-check-in bag (the tag should indicate layover and final destination Airport Codes).  
3.  A free shuttle runs between the terminal complex and the BWI Marshall Rail Station (where you can pick up the MARC trains to Baltimore or Washington. This shuttle makes stops on the lower-level terminal roadway, between doors 1-2, 8-9, 14-15 & 17-18. 
4.  Light Rail service (accessible from Main Terminal, lower level outside International Arrivals) runs from BWI Airport to downtown Baltimore, Timonium, and Hunt Valley. If you need to get to Penn Station, exit the train at Mt. Royal Avenue, and change to the Penn Station Light Rail.

The Upper Level of the Main Terminal, which is the departure & ticketing level, is surrounded by Concourses A to E at the following locations: Concourse C is in the center, to the left is Concourse D , followed by a short Concourse E. To the right of the Terminal center is Concourse A/B, which runs along the right side of the terminal and then splits into separate concourses. Three Skywalks from this level lead to level 6, and one at the south-east corner, to level 5, of the parking garage.
The Lower Level of the Main Terminal, which is the arrivals & baggage claim level, has baggage claim areas numbered: 1-5, 6-9, 10-12 and 13-14.  A USO lounge is near 13-14 and ATM machines are near 13-14, 10-12 & 1-5. Past USO is International Arrivals with customs, information desk and light rail access. The outside of the lower level is surrounded by the following modes of transportation stops: light rail, shuttles to parking and to Amtrak & MARC trains, MTA buses, SuperShuttle & Airport Shuttle, Taxi stands & limousines and rental car shuttles.

Concourse A/B with gates A1-11 and B1-15 on opposite sides, serve AirTran &  Southwest airlines; it has a Travelex currency exchange, an M&T Bank, an ATM cash machine, a UPS & FedEx, and an Information desk.  A new 4-lane security checkpoint on the lower level of Terminal A/B provides access to all of  Concourses A & B gates, which have a large number of food & drink, as well as retail concessions. To get to Concourse C, use the B/C connector.
Concourse C with gates C1-C14, currently serves American, Southwest & Spirit airlines, and has an ATM cash machine, 2 food & drink & a news concession. 
Concourse C will undergo improvements throughout the summer of 2013, with enhanced gste hold rooms, new food & retail concessions along B/C Connector and Concourse C, & iproved Observation Gallery with new amenities.
Concourse D with gates D1-5, D7-16 & D21-35, currently serves Delta, JetBlue, United & US Airways, and houses the AirSpace Lounge, accessible to all passengers at a daily fee. It has an ATM machine, children's paly area, shoeshine, food & drink and some retail outlets.
Concourse E - the official International Terminal currently serves Air Canada Jazz, Air Mobility Command, British Airways,  Condor & Frontier airlines and handles all international arrivals from Airports without U.S. clearance facilities.  It has the Wine Bar & Eatery, a newsstand and a duty-free shop;  the British Airways Chesapeake Club Lounge near its entrance (a common-use lounge available to passengers of all international concourse airlines). 

OtherAmenities & Services in the Main Terminal and Concourses include: Food & drink and retail concessions; the Customer Service Center (upper level near Concourse D), the USO International Gateway Lounge next to baggage claim 14, at lower level, international pier (tel. 410-859-4425; Information desks (tel. 800-I-FLY-BWI); a conference room (410-859-7394), internet access, ATM cash machines, M&TBank, mail boxes, UPS & FedEx drop, tax & duty-free shop at Concourse E; Currency Exchange near Concourse C, and an Observation Gallery.  BWI now offers the option of free internet access or paid premium service.
A new lounge is available to all passengers with free food & drink, work stations & WiFi access (day pass around $20).