There are
2,042 mi
from Dekalb, IL to Lathrop, CA
That's the driving distance. It would take 1 day 10 hours to go from Dekalb, Illinois to Lathrop, California.
The flight distance (direct flight from Dekalb, IL to Lathrop, CA) is 1,737.20 mi.
2,042 mi = 3,286.13 kms