There are
654 mi
from Fayetteville, AR to Port Lavaca, TX
That's the driving distance. It would take 12 hours 9 mins to go from Fayetteville, Arkansas to Port Lavaca, Texas.
The flight distance (direct flight from Fayetteville, AR to Port Lavaca, TX) is 534.32 mi.
654 mi = 1,052.78 kms