There are
2,289 mi
from Clarksville, TN to Foster City, CA
That's the driving distance. It would take 1 day 16 hours to go from Clarksville, Tennessee to Foster City, California.
The flight distance (direct flight from Clarksville, TN to Foster City, CA) is 1,915.51 mi.
2,289 mi = 3,684.23 kms