There are
2,223 mi
from Oswego, IL to Eureka, CA
That's the driving distance. It would take 1 day 14 hours to go from Oswego, Illinois to Eureka, California.
The flight distance (direct flight from Oswego, IL to Eureka, CA) is 1,848.08 mi.
2,223 mi = 3,578.32 kms