There are
516 mi
from Sioux City, IA to Mandan, ND
That's the driving distance. It would take 8 hours 20 mins to go from Sioux City, Iowa to Mandan, North Dakota.
The flight distance (direct flight from Sioux City, IA to Mandan, ND) is 371.41 mi.
516 mi = 831.08 kms