There are
1,949 mi
from Fontana, CA to Downers Grove, IL
That's the driving distance. It would take 1 day 10 hours to go from Fontana, California to Downers Grove, Illinois.
The flight distance (direct flight from Fontana, CA to Downers Grove, IL) is 1,679.75 mi.
1,949 mi = 1.61 kms