Baltimore/Washington International Thurgood Marshall Airport — Baltimore, United States

Baltimore/Washington International Thurgood Marshall Airport serves Baltimore, Maryland, sitting roughly midway between Baltimore and Washington, D.C., which makes it one of three major airports covering the wider capital region alongside Reagan National and Dulles. At 146 feet above sea level, BWI operates three runways and has grown into the largest base on the East Coast for Southwest Airlines, which drives much of its passenger traffic. The airport's full name honors Thurgood Marshall, the first Black justice to serve on the U.S. Supreme Court, who was born and raised in Baltimore before becoming a leading civil rights attorney and eventually a justice. That name was formally added in 2005, layered onto a facility that had already operated for decades as Baltimore's primary commercial gateway. Today BWI balances domestic leisure and business travel with a modest slate of international routes, giving Maryland travelers an alternative to the more congested airports closer to the district.