There are
2,018 mi
from Palatine, IL to Downey, CA
That's the driving distance. It would take 1 day 11 hours to go from Palatine, Illinois to Downey, California.
The flight distance (direct flight from Palatine, IL to Downey, CA) is 1,722.13 mi.
2,018 mi = 3,246.94 kms