The flight distance from Baltimore/Washington International Thurgood Marshall Airport (BWI) in Baltimore, United States to St Mary's Airport (KSM) in St Mary'S, United States is 6,070 kilometers (3,772 miles / 3,277 nautical miles). The estimated flight time for this route is approximately 8h, flying northwest at a heading of 325°.

This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.

This is a domestic route within United States. Both airports operate in the same country, which may simplify travel requirements and documentation. Despite being a domestic route, there is a 4-hour time difference between the two cities.

Time zone information: When it's 10:21 in Baltimore, it's 06:21 in St Mary'S. The 4-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from St Mary'S (KSM) to Baltimore (BWI) follows a heading of 72° (east northeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Baltimore/Washington International Thurgood Marshall Airport (BWI) and St Mary's Airport (KSM) detail pages, or use our flight duration calculator to compare other routes.