There are
1,877 mi
from Missoula, MT to Clarksville, TN
That's the driving distance. It would take 1 day 8 hours to go from Missoula, Montana to Clarksville, Tennessee.
The flight distance (direct flight from Missoula, MT to Clarksville, TN) is 1,539.08 mi.
1,877 mi = 1.61 kms