There are
418 mi
from Clarksville, TN to Des Plaines, IL
That's the driving distance. It would take 8 hours 58 mins to go from Clarksville, Tennessee to Des Plaines, Illinois.
The flight distance (direct flight from Clarksville, TN to Des Plaines, IL) is 381.29 mi.
418 mi = 672.27 kms