There are
346 mi
from Clarksville, TN to Rantoul, IL
That's the driving distance. It would take 6 hours 24 mins to go from Clarksville, Tennessee to Rantoul, Illinois.
The flight distance (direct flight from Clarksville, TN to Rantoul, IL) is 264.61 mi.
346 mi = 556.17 kms