There are
1,413 mi
from Middletown, OH to Harlingen, TX
That's the driving distance. It would take 1 day 2 hours to go from Middletown, Ohio to Harlingen, Texas.
The flight distance (direct flight from Middletown, OH to Harlingen, TX) is 1,198.52 mi.
1,413 mi = 2,273.77 kms