There are
697 mi
from Youngstown, OH to Marshalltown, IA
That's the driving distance. It would take 12 hours 57 mins to go from Youngstown, Ohio to Marshalltown, Iowa.
The flight distance (direct flight from Youngstown, OH to Marshalltown, IA) is 636.45 mi.
697 mi = 1,122.26 kms