There are
2,270 mi
from Pittsburg, CA to Clarksville, TN
That's the driving distance. It would take 1 day 16 hours to go from Pittsburg, California to Clarksville, Tennessee.
The flight distance (direct flight from Pittsburg, CA to Clarksville, TN) is 1,890.04 mi.
2,270 mi = 3,653.49 kms