There are
281 mi
from Chattanooga, TN to Clarksville, IN
That's the driving distance. It would take 5 hours 35 mins to go from Chattanooga, Tennessee to Clarksville, Indiana.
The flight distance (direct flight from Chattanooga, TN to Clarksville, IN) is 226.01 mi.
281 mi = 451.45 kms