There are
2,872 mi
from Wilmington, DE to San Leandro, CA
That's the driving distance. It would take 2 days 2 hours to go from Wilmington, Delaware to San Leandro, California.
The flight distance (direct flight from Wilmington, DE to San Leandro, CA) is 2,487.43 mi.
2,872 mi = 3.22 kms