There are
423 mi
from Clarksville, TN to Schaumburg, IL
That's the driving distance. It would take 9 hours 6 mins to go from Clarksville, Tennessee to Schaumburg, Illinois.
The flight distance (direct flight from Clarksville, TN to Schaumburg, IL) is 382.22 mi.
423 mi = 680.09 kms