There are
806 mi
from Clarksville, TN to Middletown, DE
That's the driving distance. It would take 15 hours 17 mins to go from Clarksville, Tennessee to Middletown, Delaware.
The flight distance (direct flight from Clarksville, TN to Middletown, DE) is 664.76 mi.
806 mi = 1,296.81 kms