There are
2,492 mi
from Santee, CA to Johnstown, PA
That's the driving distance. It would take 1 day 20 hours to go from Santee, California to Johnstown, Pennsylvania.
The flight distance (direct flight from Santee, CA to Johnstown, PA) is 2,156.01 mi.
2,492 mi = 4,010.46 kms