Distance calculator

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

KGUS · Grissom Air Reserve Base → KBOS · Boston Logan International Airport

Distance
687.7 nm
1,273.7 km · 791.4 mi
Course (true)
076°
Reverse course
266°
Flight time
1:34

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