There are
1,024 mi
from Wilmington, DE to Wausau, WI
That's the driving distance. It would take 19 hours 18 mins to go from Wilmington, Delaware to Wausau, Wisconsin.
The flight distance (direct flight from Wilmington, DE to Wausau, WI) is 802.77 mi.
1,024 mi = 1.61 kms