There are
420 mi
from Duluth, MN to Sycamore, IL
That's the driving distance. It would take 8 hours 2 mins to go from Duluth, Minnesota to Sycamore, Illinois.
The flight distance (direct flight from Duluth, MN to Sycamore, IL) is 371.79 mi.
420 mi = 676.00 kms