There are
1,660 mi
from Harlingen, TX to Pontiac, MI
That's the driving distance. It would take 1 day 6 hours to go from Harlingen, Texas to Pontiac, Michigan.
The flight distance (direct flight from Harlingen, TX to Pontiac, MI) is 1,397.64 mi.
1,660 mi = 2,672.23 kms