There are
1,956 mi
from Clarksville, TN to Fontana, CA
That's the driving distance. It would take 1 day 10 hours to go from Clarksville, Tennessee to Fontana, California.
The flight distance (direct flight from Clarksville, TN to Fontana, CA) is 1,697.15 mi.
1,956 mi = 3,147.79 kms