There are
852 mi
from Clarksville, TN to Ithaca, NY
That's the driving distance. It would take 16 hours 31 mins to go from Clarksville, Tennessee to Ithaca, New York.
The flight distance (direct flight from Clarksville, TN to Ithaca, NY) is 707.73 mi.
852 mi = 1,371.27 kms