There are
311 mi
from Middletown, OH to Glendale Heights, IL
That's the driving distance. It would take 6 hours 20 mins to go from Middletown, Ohio to Glendale Heights, Illinois.
The flight distance (direct flight from Middletown, OH to Glendale Heights, IL) is 254.44 mi.
311 mi = 501.28 kms