There are
2,687 mi
from Wilmington, DE to Temecula, CA
That's the driving distance. It would take 2 days to go from Wilmington, Delaware to Temecula, California.
The flight distance (direct flight from Wilmington, DE to Temecula, CA) is 2,325.78 mi.
2,687 mi = 4,324.15 kms