There are
2,140 mi
from San Leandro, CA to Round Lake Beach, IL
That's the driving distance. It would take 1 day 13 hours to go from San Leandro, California to Round Lake Beach, Illinois.
The flight distance (direct flight from San Leandro, CA to Round Lake Beach, IL) is 1,817.61 mi.
2,140 mi = 3.22 kms