There are
1,595 mi
from Rosemead, CA to Harlingen, TX
That's the driving distance. It would take 1 day 3 hours to go from Rosemead, California to Harlingen, Texas.
The flight distance (direct flight from Rosemead, CA to Harlingen, TX) is 1,330.82 mi.
1,595 mi = 2,566.85 kms