There are
1,596 mi
from Harlingen, TX to Montebello, CA
That's the driving distance. It would take 1 day 3 hours to go from Harlingen, Texas to Montebello, California.
The flight distance (direct flight from Harlingen, TX to Montebello, CA) is 1,331.63 mi.
1,596 mi = 2,567.78 kms