There are
838 mi
from Wilmington, DE to Muskego, WI
That's the driving distance. It would take 15 hours 53 mins to go from Wilmington, Delaware to Muskego, Wisconsin.
The flight distance (direct flight from Wilmington, DE to Muskego, WI) is 688.08 mi.
838 mi = 1,349.25 kms