There are
27 mi
from Rancho Cucamonga, CA to Monrovia, CA
That's the driving distance. It would take 35 minutes to go from Rancho Cucamonga, California to Monrovia, California.
The flight distance (direct flight from Rancho Cucamonga, CA to Monrovia, CA) is 23.54 mi.
27 mi = 43.85 kms