There are
2,057 mi
from Rockford, IL to Lathrop, CA
That's the driving distance. It would take 1 day 11 hours to go from Rockford, Illinois to Lathrop, California.
The flight distance (direct flight from Rockford, IL to Lathrop, CA) is 1,719.16 mi.
2,057 mi = 3.22 kms