There are
2,140 mi
from San Leandro, CA to Grayslake, IL
That's the driving distance. It would take 1 day 13 hours to go from San Leandro, California to Grayslake, Illinois.
The flight distance (direct flight from San Leandro, CA to Grayslake, IL) is 1,820.13 mi.
2,140 mi = 3.22 kms