There are
1,591 mi
from Harlingen, TX to La Palma, CA
That's the driving distance. It would take 1 day 3 hours to go from Harlingen, Texas to La Palma, California.
The flight distance (direct flight from Harlingen, TX to La Palma, CA) is 1,324.29 mi.
1,591 mi = 2,561.12 kms