There are
1,958 mi
from Clarksville, TN to San Bernardino, CA
That's the driving distance. It would take 1 day 10 hours to go from Clarksville, Tennessee to San Bernardino, California.
The flight distance (direct flight from Clarksville, TN to San Bernardino, CA) is 1,688.84 mi.
1,958 mi = 3,150.30 kms