There are
944 mi
from Champaign, IL to Mandan, ND
That's the driving distance. It would take 16 hours 49 mins to go from Champaign, Illinois to Mandan, North Dakota.
The flight distance (direct flight from Champaign, IL to Mandan, ND) is 783.97 mi.
944 mi = 1,519.41 kms