There are
910 mi
from Overland Park, KS to Johnstown, PA
That's the driving distance. It would take 17 hours 41 mins to go from Overland Park, Kansas to Johnstown, Pennsylvania.
The flight distance (direct flight from Overland Park, KS to Johnstown, PA) is 841.77 mi.
910 mi = 1,465.14 kms