There are
1,247 mi
from Clarksville, TN to Mandan, ND
That's the driving distance. It would take 22 hours 49 mins to go from Clarksville, Tennessee to Mandan, North Dakota.
The flight distance (direct flight from Clarksville, TN to Mandan, ND) is 994.11 mi.
1,247 mi = 1.61 kms