There are
1,975 mi
from Oswego, IL to Fullerton, CA
That's the driving distance. It would take 1 day 10 hours to go from Oswego, Illinois to Fullerton, California.
The flight distance (direct flight from Oswego, IL to Fullerton, CA) is 1,693.05 mi.
1,975 mi = 3,178.46 kms