Miles between Rapid City, SD and Duncan, OK

There are
938 mi
from Rapid City, SD to Duncan, OK

That's the driving distance. It would take 16 hours 57 mins to go from Rapid City, South Dakota to Duncan, Oklahoma.

The flight distance (direct flight from Rapid City, SD to Duncan, OK) is 718.96 mi.

938 mi = 1,509.53 kms