There are
2,482 mi
from Temecula, CA to Johnstown, PA
That's the driving distance. It would take 1 day 20 hours to go from Temecula, California to Johnstown, Pennsylvania.
The flight distance (direct flight from Temecula, CA to Johnstown, PA) is 2,146.47 mi.
2,482 mi = 3.22 kms