There are
425 mi
from Duluth, MN to Sioux City, IA
That's the driving distance. It would take 8 hours 22 mins to go from Duluth, Minnesota to Sioux City, Iowa.
The flight distance (direct flight from Duluth, MN to Sioux City, IA) is 363.75 mi.
425 mi = 683.70 kms