There are
840 mi
from Overland Park, KS to Youngstown, OH
That's the driving distance. It would take 15 hours 55 mins to go from Overland Park, Kansas to Youngstown, Ohio.
The flight distance (direct flight from Overland Park, KS to Youngstown, OH) is 755.09 mi.
840 mi = 1,351.36 kms