There are
2,089 mi
from Rockford, IL to San Leandro, CA
That's the driving distance. It would take 1 day 11 hours to go from Rockford, Illinois to San Leandro, California.
The flight distance (direct flight from Rockford, IL to San Leandro, CA) is 1,766.48 mi.
2,089 mi = 3.22 kms