There are
395 mi
from Sioux City, IA to Janesville, WI
That's the driving distance. It would take 8 hours 15 mins to go from Sioux City, Iowa to Janesville, Wisconsin.
The flight distance (direct flight from Sioux City, IA to Janesville, WI) is 375.57 mi.
395 mi = 636.14 kms