There are
1,947 mi
from Rancho Cucamonga, CA to Naperville, IL
That's the driving distance. It would take 1 day 9 hours to go from Rancho Cucamonga, California to Naperville, Illinois.
The flight distance (direct flight from Rancho Cucamonga, CA to Naperville, IL) is 1,680.17 mi.
1,947 mi = 1.61 kms