There are
2,120 mi
from San Leandro, CA to Romeoville, IL
That's the driving distance. It would take 1 day 12 hours to go from San Leandro, California to Romeoville, Illinois.
The flight distance (direct flight from San Leandro, CA to Romeoville, IL) is 1,819.47 mi.
2,120 mi = 3.22 kms