There are
2,109 mi
from San Leandro, CA to Naperville, IL
That's the driving distance. It would take 1 day 12 hours to go from San Leandro, California to Naperville, Illinois.
The flight distance (direct flight from San Leandro, CA to Naperville, IL) is 1,816.04 mi.
2,109 mi = 3.22 kms