There are
394 mi
from Rancho Cucamonga, CA to Pittsburg, CA
That's the driving distance. It would take 7 hours 26 mins to go from Rancho Cucamonga, California to Pittsburg, California.
The flight distance (direct flight from Rancho Cucamonga, CA to Pittsburg, CA) is 361.68 mi.
394 mi = 633.63 kms