There are
1,662 mi
from Clarksville, TN to Rexburg, ID
That's the driving distance. It would take 1 day 6 hours to go from Clarksville, Tennessee to Rexburg, Idaho.
The flight distance (direct flight from Clarksville, TN to Rexburg, ID) is 1,378.05 mi.
1,662 mi = 1.61 kms