There are
1,959 mi
from Rancho Cucamonga, CA to Darien, IL
That's the driving distance. It would take 1 day 10 hours to go from Rancho Cucamonga, California to Darien, Illinois.
The flight distance (direct flight from Rancho Cucamonga, CA to Darien, IL) is 1,688.62 mi.
1,959 mi = 1.61 kms