The distance between Baltimore, Maryland, and Washington, D.C., is approximately 39 miles (63 kilometers) as the crow flies. Road distances vary depending on the specific route taken, typically ranging from 35 to 45 miles. This proximity makes travel between the two cities common.
The short distance fosters significant economic and cultural ties between the two metropolitan areas. The ease of travel facilitates commuting, business collaborations, and shared access to cultural amenities. Historically, this connection has influenced regional development and growth patterns.