There are
2,727 mi
from Wilmington, DE to Simi Valley, CA
That's the driving distance. It would take 2 days 1 hour to go from Wilmington, Delaware to Simi Valley, California.
The flight distance (direct flight from Wilmington, DE to Simi Valley, CA) is 2,391.86 mi.
2,727 mi = 3.22 kms