There are
2,448 mi
from Rancho Cucamonga, CA to Johnstown, PA
That's the driving distance. It would take 1 day 20 hours to go from Rancho Cucamonga, California to Johnstown, Pennsylvania.
The flight distance (direct flight from Rancho Cucamonga, CA to Johnstown, PA) is 2,153.06 mi.
2,448 mi = 3.22 kms