Distance calculator

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

KSTL · St. Louis Lambert International Airport → KSPW · Spencer Municipal Airport

Distance
343.9 nm
636.9 km · 395.7 mi
Course (true)
322°
Reverse course
139°
Flight time
0:47

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