There are
2,055 mi
from Oswego, IL to Fairfield, CA
That's the driving distance. It would take 1 day 11 hours to go from Oswego, Illinois to Fairfield, California.
The flight distance (direct flight from Oswego, IL to Fairfield, CA) is 1,788.14 mi.
2,055 mi = 3,306.61 kms