There are
1,150 mi
from Wilmington, DE to Leavenworth, KS
That's the driving distance. It would take 22 hours 3 mins to go from Wilmington, Delaware to Leavenworth, Kansas.
The flight distance (direct flight from Wilmington, DE to Leavenworth, KS) is 1,031 mi.
1,150 mi = 1.61 kms