There are
448 mi
from Rancho Cucamonga, CA to Petaluma, CA
That's the driving distance. It would take 8 hours 24 mins to go from Rancho Cucamonga, California to Petaluma, California.
The flight distance (direct flight from Rancho Cucamonga, CA to Petaluma, CA) is 400.39 mi.
448 mi = 721.03 kms