Distance calculator

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

KDCA · Ronald Reagan Washington National Airport → KBOS · Boston Logan International Airport

Distance
346.2 nm
641.1 km · 398.4 mi
Course (true)
051°
Reverse course
235°
Flight time
0:47

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