There are
920 mi
from Olathe, KS to Johnstown, PA
That's the driving distance. It would take 17 hours 49 mins to go from Olathe, Kansas to Johnstown, Pennsylvania.
The flight distance (direct flight from Olathe, KS to Johnstown, PA) is 850.97 mi.
920 mi = 1,480.08 kms