There are
1,992 mi
from Wheaton, IL to Downey, CA
That's the driving distance. It would take 1 day 10 hours to go from Wheaton, Illinois to Downey, California.
The flight distance (direct flight from Wheaton, IL to Downey, CA) is 1,715.81 mi.
1,992 mi = 3,205.92 kms