There are
820 mi
from Clarksville, TN to New Ulm, MN
That's the driving distance. It would take 15 hours 51 mins to go from Clarksville, Tennessee to New Ulm, Minnesota.
The flight distance (direct flight from Clarksville, TN to New Ulm, MN) is 654.22 mi.
820 mi = 1,319.50 kms