Distance calculator

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

KFDK · Frederick Municipal Airport → KBOS · Boston Logan International Airport

Distance
338.6 nm
627.1 km · 389.7 mi
Course (true)
056°
Reverse course
241°
Flight time
0:46

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