There are
504 mi
from Champaign, IL to Sevierville, TN
That's the driving distance. It would take 9 hours 18 mins to go from Champaign, Illinois to Sevierville, Tennessee.
The flight distance (direct flight from Champaign, IL to Sevierville, TN) is 388.65 mi.
504 mi = 810.32 kms