Baltimore/Washington International Thurgood Marshall Airport

Baltimore-Washington International Thurgood Marshall Airport is the primary airport for the Baltimore metropolitan area and a major alternative airport for the Washington DC market. BWI handles around 27 million passengers per year and sits about 10 miles south of downtown Baltimore. Southwest Airlines operates its largest East Coast base at BWI, accounting for approximately 70 percent of the airport's traffic. Southwest's presence makes BWI one of the most low-cost-focused airports in the major American network. The airport has a single main terminal with five concourses. BWI also handles significant cargo operations, particularly for FedEx and UPS. International service is limited compared to Washington Dulles but has been growing, with direct flights to London, Frankfurt, and several Caribbean destinations. BWI is the Washington metropolitan area's low-cost gateway and is increasingly important for passengers willing to use the MARC train to connect to the DC area.