There are
1,896 mi
from Downey, CA to Centralia, IL
That's the driving distance. It would take 1 day 9 hours to go from Downey, California to Centralia, Illinois.
The flight distance (direct flight from Downey, CA to Centralia, IL) is 1,639.85 mi.
1,896 mi = 3,051.63 kms