There are
1,415 mi
from Harlingen, TX to Middletown, OH
That's the driving distance. It would take 1 day 2 hours to go from Harlingen, Texas to Middletown, Ohio.
The flight distance (direct flight from Harlingen, TX to Middletown, OH) is 1,198.52 mi.
1,415 mi = 2,276.94 kms