There are
2,003 mi
from Oswego, IL to Simi Valley, CA
That's the driving distance. It would take 1 day 11 hours to go from Oswego, Illinois to Simi Valley, California.
The flight distance (direct flight from Oswego, IL to Simi Valley, CA) is 1,724.35 mi.
2,003 mi = 3,222.85 kms