There are
552 mi
from Champaign, IL to Sioux City, IA
That's the driving distance. It would take 10 hours 3 mins to go from Champaign, Illinois to Sioux City, Iowa.
The flight distance (direct flight from Champaign, IL to Sioux City, IA) is 454.02 mi.
552 mi = 888.84 kms