There are
1,969 mi
from Harlingen, TX to Alameda, CA
That's the driving distance. It would take 1 day 10 hours to go from Harlingen, Texas to Alameda, California.
The flight distance (direct flight from Harlingen, TX to Alameda, CA) is 1,638.54 mi.
1,969 mi = 3,168.03 kms