There are
2,790 mi
from Wilmington, DE to Oroville, CA
That's the driving distance. It would take 2 days 1 hour to go from Wilmington, Delaware to Oroville, California.
The flight distance (direct flight from Wilmington, DE to Oroville, CA) is 2,420.69 mi.
2,790 mi = 3.22 kms