There are
859 mi
from Rancho Cucamonga, CA to Idaho Falls, ID
That's the driving distance. It would take 14 hours 40 mins to go from Rancho Cucamonga, California to Idaho Falls, Idaho.
The flight distance (direct flight from Rancho Cucamonga, CA to Idaho Falls, ID) is 713.78 mi.
859 mi = 1,383.03 kms