There are
471 mi
from Sioux City, IA to Dekalb, IL
That's the driving distance. It would take 8 hours 37 mins to go from Sioux City, Iowa to Dekalb, Illinois.
The flight distance (direct flight from Sioux City, IA to Dekalb, IL) is 393.31 mi.
471 mi = 758.61 kms