There are
1,012 mi
from Sioux City, IA to Knoxville, TN
That's the driving distance. It would take 18 hours 40 mins to go from Sioux City, Iowa to Knoxville, Tennessee.
The flight distance (direct flight from Sioux City, IA to Knoxville, TN) is 805.04 mi.
1,012 mi = 1.61 kms