There are
1,598 mi
from Monterey Park, CA to Harlingen, TX
That's the driving distance. It would take 1 day 3 hours to go from Monterey Park, California to Harlingen, Texas.
The flight distance (direct flight from Monterey Park, CA to Harlingen, TX) is 1,333.13 mi.
1,598 mi = 2,571.32 kms