There are
449 mi
from Clarksville, TN to Palos Heights, IL
That's the driving distance. It would take 8 hours 22 mins to go from Clarksville, Tennessee to Palos Heights, Illinois.
The flight distance (direct flight from Clarksville, TN to Palos Heights, IL) is 355.79 mi.
449 mi = 722.32 kms