There are
931 mi
from Clarksville, TN to Amarillo, TX
That's the driving distance. It would take 16 hours 30 mins to go from Clarksville, Tennessee to Amarillo, Texas.
The flight distance (direct flight from Clarksville, TN to Amarillo, TX) is 814.43 mi.
931 mi = 1,498.55 kms