Miles between Harlingen, TX and Slidell, LA

There are
686 mi
from Harlingen, TX to Slidell, LA

That's the driving distance. It would take 13 hours 13 mins to go from Harlingen, Texas to Slidell, Louisiana.

The flight distance (direct flight from Harlingen, TX to Slidell, LA) is 558.14 mi.

686 mi = 1,104.07 kms