There are
662 mi
from Sioux City, IA to Portage, MI
That's the driving distance. It would take 12 hours 12 mins to go from Sioux City, Iowa to Portage, Michigan.
The flight distance (direct flight from Sioux City, IA to Portage, MI) is 552.52 mi.
662 mi = 1,064.63 kms