There are
30 mi
from Rancho Cucamonga, CA to Placentia, CA
That's the driving distance. It would take 40 minutes to go from Rancho Cucamonga, California to Placentia, California.
The flight distance (direct flight from Rancho Cucamonga, CA to Placentia, CA) is 22.66 mi.
30 mi = 48.25 kms