There are
1,954 mi
from Rancho Cucamonga, CA to Downers Grove, IL
That's the driving distance. It would take 1 day 10 hours to go from Rancho Cucamonga, California to Downers Grove, Illinois.
The flight distance (direct flight from Rancho Cucamonga, CA to Downers Grove, IL) is 1,687.34 mi.
1,954 mi = 1.61 kms