There are
1,991 mi
from Downey, CA to Algonquin, IL
That's the driving distance. It would take 1 day 11 hours to go from Downey, California to Algonquin, Illinois.
The flight distance (direct flight from Downey, CA to Algonquin, IL) is 1,709.60 mi.
1,991 mi = 1.61 kms