There are
805 mi
from Clarksville, TN to Dickinson, TX
That's the driving distance. It would take 14 hours 57 mins to go from Clarksville, Tennessee to Dickinson, Texas.
The flight distance (direct flight from Clarksville, TN to Dickinson, TX) is 660.74 mi.
805 mi = 1,295.65 kms