There are
1,596 mi
from Harlingen, TX to Los Alamitos, CA
That's the driving distance. It would take 1 day 3 hours to go from Harlingen, Texas to Los Alamitos, California.
The flight distance (direct flight from Harlingen, TX to Los Alamitos, CA) is 1,324.79 mi.
1,596 mi = 2,568.67 kms