There are
2,060 mi
from Pomona, CA to Clarksville, IN
That's the driving distance. It would take 1 day 11 hours to go from Pomona, California to Clarksville, Indiana.
The flight distance (direct flight from Pomona, CA to Clarksville, IN) is 1,799.01 mi.
2,060 mi = 3,315.48 kms