There are
1,416 mi
from Harlingen, TX to Calexico, CA
That's the driving distance. It would take 1 day to go from Harlingen, Texas to Calexico, California.
The flight distance (direct flight from Harlingen, TX to Calexico, CA) is 1,159.29 mi.
1,416 mi = 2,279.37 kms