There are
1,462 mi
from Harlingen, TX to Chillicothe, OH
That's the driving distance. It would take 1 day 3 hours to go from Harlingen, Texas to Chillicothe, Ohio.
The flight distance (direct flight from Harlingen, TX to Chillicothe, OH) is 1,243.80 mi.
1,462 mi = 2,353.53 kms