There are
886 mi
from Rancho Cucamonga, CA to Rexburg, ID
That's the driving distance. It would take 15 hours 9 mins to go from Rancho Cucamonga, California to Rexburg, Idaho.
The flight distance (direct flight from Rancho Cucamonga, CA to Rexburg, ID) is 739.83 mi.
886 mi = 1,426.00 kms