There are
717 mi
from Clarksville, TN to Sulphur, LA
That's the driving distance. It would take 13 hours 31 mins to go from Clarksville, Tennessee to Sulphur, Louisiana.
The flight distance (direct flight from Clarksville, TN to Sulphur, LA) is 556.15 mi.
717 mi = 1,153.49 kms