There are
674 mi
from Clarksville, TN to Denton, TX
That's the driving distance. It would take 12 hours 25 mins to go from Clarksville, Tennessee to Denton, Texas.
The flight distance (direct flight from Clarksville, TN to Denton, TX) is 599.13 mi.
674 mi = 1,084.04 kms