There are
492 mi
from Sioux City, IA to Grafton, WI
That's the driving distance. It would take 9 hours 46 mins to go from Sioux City, Iowa to Grafton, Wisconsin.
The flight distance (direct flight from Sioux City, IA to Grafton, WI) is 431.01 mi.
492 mi = 792.58 kms