Baltimore/Washington International Thurgood Marshall Airport (BWI) is the primary commercial airport serving the Baltimore metropolitan area and one of three major airports serving the broader Washington-Baltimore region. Located in Anne Arundel County, Maryland, approximately 10 miles south of Baltimore and 32 miles northeast of Washington D.C., BWI is the largest of the three region's airports by passenger volume and is the primary hub for Southwest Airlines on the East Coast.
Baltimore/Washington International Thurgood Marshall Airport — renamed in 2005 in honor of Supreme Court Justice Thurgood Marshall, a Baltimore native — operates as a single terminal complex with six concourses (A through F) connected on the airside. The airport's single-terminal design supports efficient connections and straightforward navigation compared to multi-terminal airports of similar size.
BWI has positioned itself as the value-oriented airport of the Washington-Baltimore region, complementing the more business-focused DCA (Reagan National) and the international gateway role of IAD (Dulles). Southwest Airlines has built BWI into one of its largest hubs nationwide, operating high-frequency domestic service to virtually its entire network. This Southwest concentration gives BWI some of the lowest average fares in the region and makes it the preferred choice for cost-conscious travelers.
BWI processes approximately 25–27 million passengers annually and provides nonstop service to more than 90 destinations. The airport benefits from both the Baltimore and Washington D.C. markets, drawing passengers from across the region.
Baltimore Municipal Airport opened in 1950 at its current site in Anne Arundel County, replacing a smaller airport closer to the city. The facility was renamed Friendship International Airport, then Baltimore-Washington International Airport, and finally — in 2005 — Baltimore/Washington International Thurgood Marshall Airport in honor of the late Supreme Court Justice who was born and raised in Baltimore.
Southwest Airlines established BWI as a major base in the early 1990s during its expansion into the eastern United States, choosing BWI over the more constrained and expensive DCA and Dulles airports. This strategic decision transformed BWI from a mid-sized regional airport into one of the most Southwest-concentrated major airports in the country. MARC train service from the BWI Rail Station has operated since 1986, providing an important ground transportation option.
BWI operates as a single continuous terminal building with six concourses. Concourse A is the international concourse and handles a mix of domestic and international arrivals and departures. Concourses B and C handle Southwest Airlines and other domestic carriers. Concourse D is used by Southwest and additional carriers. Concourse E handles other domestic carriers. Concourse F, opened as a newer addition, adds gate capacity for Southwest and other high-frequency operators.
All concourses are connected airside, allowing passengers to move between gates within the terminal without clearing security again. The BWI terminal has a continuous pedestrian circulation path that is relatively easy to navigate.
Southwest Airlines is the dominant carrier at BWI, operating an extensive domestic network with service to virtually every city in Southwest's route system. Southwest's high-frequency operations from BWI make it a strong connecting option for East Coast travel. Other significant carriers at BWI include American Airlines, Delta Air Lines, United Airlines, JetBlue Airways, and Spirit Airlines.
International service at BWI is more limited than at IAD, but includes routes to Canada, Mexico, Iceland, and select European destinations through various carriers. The airport serves more than 90 destinations nonstop.
BWI offers a solid range of dining and retail across its concourses, with the highest concentration of options in the Concourses B, C, and D Southwest areas. The airport does not have the luxury airline lounge presence of a major legacy carrier hub, reflecting Southwest's no-frills positioning. Free Wi-Fi is available throughout. Nursing rooms, interfaith prayer spaces, and pet relief areas are located across the terminal.
BWI's single-terminal layout makes it one of the easier large airports to navigate. The airport has invested in restroom modernization and passenger experience improvements in recent years.
BWI is served by two rail connections. The MTA Light Rail Blue Line has a station directly on the airport campus, accessible from the terminal via a free shuttle bus, providing service to downtown Baltimore and points north and south. MARC commuter rail serves BWI Rail Station (approximately one mile from the terminal, accessible via free airport shuttle), with direct service to Baltimore Penn Station, Washington Union Station, and points along the Penn Line corridor.
Amtrak also stops at BWI Rail Station, providing inter-city rail connections between Baltimore and the Northeast Corridor. Rideshare services, taxis, and rental cars are available from the ground transportation level. The airport is accessible via MD-295 (Baltimore-Washington Parkway) and I-195.
BWI provides extensive on-site parking with garages adjacent to the terminal and economy lots with shuttle service. The airport's parking complex is one of the larger airport parking facilities in the region, designed to accommodate the high volume of regional travelers who drive to BWI. Competitive parking rates are available at economy lots. The MARC train from Baltimore or Washington provides a practical alternative to parking for commuters along the Penn Line.
BWI's MARC Penn Line connection to Washington Union Station takes approximately 30–35 minutes and is one of the most convenient ways for D.C.-area travelers to access BWI. The Amtrak connection at BWI Rail Station also allows direct travel from the airport to Penn Station New York and other Northeast Corridor cities without returning to downtown Baltimore or Washington.
Southwest Airlines' open seating policy (no assigned seats) means boarding position matters at BWI — check in exactly 24 hours before departure to get a favorable boarding group. BWI can be very busy on Friday afternoons when Southwest's leisure network peaks; arrive early for security if traveling on Friday evenings.
Baltimore/Washington International Thurgood Marshall Airport is a major economic asset for both the Baltimore metropolitan area and the broader Maryland state economy. BWI supports hundreds of thousands of jobs in Anne Arundel County and across the region, and generates billions in annual economic output. Southwest Airlines' hub at BWI gives the Baltimore-Washington region access to Southwest's vast domestic network at competitive fares, benefiting consumers and the regional tourism and hospitality industry.
BWI's combination of Baltimore and Washington market access — unique among the three region airports — makes it particularly valuable as a driver of economic activity across the Maryland-D.C. corridor.
BWI is pursuing capital projects to modernize its concourses and expand capacity for continued passenger growth. Maryland Transportation Authority has studied improvements to the light rail and shuttle connections. The airport is implementing sustainability programs including energy efficiency upgrades consistent with Maryland's environmental goals. Southwest Airlines continues to be the primary driver of capacity planning at BWI.
BWI is a primary commercial airport and a major domestic travel hub in the Mid-Atlantic region. It functions as one of Southwest Airlines' largest East Coast bases and the primary value-oriented airport for the Baltimore-Washington corridor.
Airports within approximately 60 miles of Baltimore/Washington International Thurgood Marshall Airport that may provide additional scheduled commercial, regional access.
Baltimore/Washington International Thurgood Marshall Airport is the region's practical, value-oriented aviation choice — a well-run single-terminal airport where Southwest Airlines' dominant presence keeps fares competitive and the MARC train connection provides one of the better airport rail links in the Mid-Atlantic. For travelers in both the Baltimore and Washington D.C. markets who prioritize low fares and straightforward navigation, BWI is a consistently reliable option.
Take the free airport shuttle to BWI Rail Station, then board MARC's Penn Line toward Washington Union Station. The trip takes approximately 35 minutes. Amtrak also serves BWI Rail Station with trains to Washington and points along the Northeast Corridor.
Southwest Airlines is by far the largest carrier at BWI and operates one of its biggest East Coast hubs from Concourses B, C, D, and F.
BWI is located in Anne Arundel County, Maryland — about 10 miles south of Baltimore and 32 miles northeast of Washington D.C. It is managed by the Maryland Aviation Administration and serves both metro markets.
BWI has limited international service compared to Dulles. Routes include service to Canada, Mexico, Iceland, and select European destinations. Concourse A handles international operations and federal inspection services.
For the most current flight schedules, parking availability, terminal maps, and ground transportation updates, visit the official Baltimore/Washington International Thurgood Marshall Airport website.
Baltimore/Washington International Thurgood Marshall Airport Official Site