There are
1,586 mi
from Harlingen, TX to Irvine, CA
That's the driving distance. It would take 1 day 3 hours to go from Harlingen, Texas to Irvine, California.
The flight distance (direct flight from Harlingen, TX to Irvine, CA) is 1,307.05 mi.
1,586 mi = 2,552.45 kms