There are
253 mi
from Clarksville, TN to Swansea, IL
That's the driving distance. It would take 4 hours 49 mins to go from Clarksville, Tennessee to Swansea, Illinois.
The flight distance (direct flight from Clarksville, TN to Swansea, IL) is 199.81 mi.
253 mi = 407.11 kms