There are
1,974 mi
from Clarksville, TN to Montclair, CA
That's the driving distance. It would take 1 day 10 hours to go from Clarksville, Tennessee to Montclair, California.
The flight distance (direct flight from Clarksville, TN to Montclair, CA) is 1,711.54 mi.
1,974 mi = 1.61 kms