There are
2,352 mi
from Wilmington, DE to Kalispell, MT
That's the driving distance. It would take 1 day 18 hours to go from Wilmington, Delaware to Kalispell, Montana.
The flight distance (direct flight from Wilmington, DE to Kalispell, MT) is 1,990.57 mi.
2,352 mi = 3.22 kms