There are
708 mi
from Clarksville, TN to Ardmore, OK
That's the driving distance. It would take 13 hours 3 mins to go from Clarksville, Tennessee to Ardmore, Oklahoma.
The flight distance (direct flight from Clarksville, TN to Ardmore, OK) is 574.58 mi.
708 mi = 1,140.10 kms