There are
1,026 mi
from Harlingen, TX to Sylacauga, AL
That's the driving distance. It would take 19 hours 24 mins to go from Harlingen, Texas to Sylacauga, Alabama.
The flight distance (direct flight from Harlingen, TX to Sylacauga, AL) is 838.55 mi.
1,026 mi = 1,651.52 kms