There are
1,986 mi
from Downey, CA to Warrenville, IL
That's the driving distance. It would take 1 day 10 hours to go from Downey, California to Warrenville, Illinois.
The flight distance (direct flight from Downey, CA to Warrenville, IL) is 1,711.93 mi.
1,986 mi = 1.61 kms