There are
1,917 mi
from Chatham, IL to Downey, CA
That's the driving distance. It would take 1 day 9 hours to go from Chatham, Illinois to Downey, California.
The flight distance (direct flight from Chatham, IL to Downey, CA) is 1,614.40 mi.
1,917 mi = 3,085.17 kms