There are
2,119 mi
from San Leandro, CA to Westmont, IL
That's the driving distance. It would take 1 day 12 hours to go from San Leandro, California to Westmont, Illinois.
The flight distance (direct flight from San Leandro, CA to Westmont, IL) is 1,824.85 mi.
2,119 mi = 3.22 kms