There are
2,020 mi
from Oceanside, CA to Warrenville, IL
That's the driving distance. It would take 1 day 11 hours to go from Oceanside, California to Warrenville, Illinois.
The flight distance (direct flight from Oceanside, CA to Warrenville, IL) is 1,697.96 mi.
2,020 mi = 3.22 kms