There are
1,658 mi
from Pontiac, MI to Harlingen, TX
That's the driving distance. It would take 1 day 6 hours to go from Pontiac, Michigan to Harlingen, Texas.
The flight distance (direct flight from Pontiac, MI to Harlingen, TX) is 1,397.64 mi.
1,658 mi = 2,668.70 kms