There are
1,567 mi
from Harlingen, TX to Sylvania, OH
That's the driving distance. It would take 1 day 5 hours to go from Harlingen, Texas to Sylvania, Ohio.
The flight distance (direct flight from Harlingen, TX to Sylvania, OH) is 1,335.30 mi.
1,567 mi = 2,522.08 kms