There are
392 mi
from Sioux City, IA to Waunakee, WI
That's the driving distance. It would take 8 hours to go from Sioux City, Iowa to Waunakee, Wisconsin.
The flight distance (direct flight from Sioux City, IA to Waunakee, WI) is 354.93 mi.
392 mi = 631.59 kms