There are
651 mi
from Waterloo, IA to Mandan, ND
That's the driving distance. It would take 11 hours 35 mins to go from Waterloo, Iowa to Mandan, North Dakota.
The flight distance (direct flight from Waterloo, IA to Mandan, ND) is 515.38 mi.
651 mi = 1,047.46 kms