There are
966 mi
from Chattanooga, TN to Sioux City, IA
That's the driving distance. It would take 17 hours 56 mins to go from Chattanooga, Tennessee to Sioux City, Iowa.
The flight distance (direct flight from Chattanooga, TN to Sioux City, IA) is 787.57 mi.
966 mi = 1,555.04 kms