Distance calculator

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

KIAD · Washington Dulles International Airport → KPSM · Portsmouth International Airport at Pease

Distance
389.5 nm
721.4 km · 448.2 mi
Course (true)
048°
Reverse course
233°
Flight time
0:53

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