There are
2,006 mi
from Clarksville, TN to Downey, CA
That's the driving distance. It would take 1 day 11 hours to go from Clarksville, Tennessee to Downey, California.
The flight distance (direct flight from Clarksville, TN to Downey, CA) is 1,738.49 mi.
2,006 mi = 3.22 kms