There are
817 mi
from Wilmington, DE to Sycamore, IL
That's the driving distance. It would take 15 hours 21 mins to go from Wilmington, Delaware to Sycamore, Illinois.
The flight distance (direct flight from Wilmington, DE to Sycamore, IL) is 703.08 mi.
817 mi = 1,314.35 kms