There are
1,606 mi
from Harlingen, TX to Amherst, OH
That's the driving distance. It would take 1 day 6 hours to go from Harlingen, Texas to Amherst, Ohio.
The flight distance (direct flight from Harlingen, TX to Amherst, OH) is 1,371.50 mi.
1,606 mi = 2,584.83 kms