There are
2,120 mi
from San Leandro, CA to Darien, IL
That's the driving distance. It would take 1 day 12 hours to go from San Leandro, California to Darien, Illinois.
The flight distance (direct flight from San Leandro, CA to Darien, IL) is 1,825.09 mi.
2,120 mi = 3.22 kms