There are
2,028 mi
from Oceanside, CA to Downers Grove, IL
That's the driving distance. It would take 1 day 11 hours to go from Oceanside, California to Downers Grove, Illinois.
The flight distance (direct flight from Oceanside, CA to Downers Grove, IL) is 1,706.05 mi.
2,028 mi = 3.22 kms