Distance calculator

Great-circle distance. Enter an airport ICAO / IATA code or coordinates (for example 52.1657, 20.9671).

KPSM · Portsmouth International Airport at Pease → KBWI · Baltimore/Washington International Thurgood Marshall Airport

Distance
353.1 nm
653.9 km · 406.3 mi
Course (true)
230°
Reverse course
047°
Flight time
0:48

Straight great-circle distance, not a route. Course is true, not magnetic.