There are
1,951 mi
from San Bernardino, CA to Clarksville, TN
That's the driving distance. It would take 1 day 9 hours to go from San Bernardino, California to Clarksville, Tennessee.
The flight distance (direct flight from San Bernardino, CA to Clarksville, TN) is 1,688.84 mi.
1,951 mi = 3,140.55 kms