There are
1,988 mi
from Oswego, IL to Temecula, CA
That's the driving distance. It would take 1 day 10 hours to go from Oswego, Illinois to Temecula, California.
The flight distance (direct flight from Oswego, IL to Temecula, CA) is 1,665.65 mi.
1,988 mi = 3,199.17 kms