There are
479 mi
from Sioux City, IA to Sycamore, IL
That's the driving distance. It would take 8 hours 47 mins to go from Sioux City, Iowa to Sycamore, Illinois.
The flight distance (direct flight from Sioux City, IA to Sycamore, IL) is 395.97 mi.
479 mi = 770.33 kms