Miles between Sioux Falls, SD and Duncan, OK

There are
720 mi
from Sioux Falls, SD to Duncan, OK

That's the driving distance. It would take 12 hours 54 mins to go from Sioux Falls, South Dakota to Duncan, Oklahoma.

The flight distance (direct flight from Sioux Falls, SD to Duncan, OK) is 628.75 mi.

720 mi = 1,158.85 kms