There are
1,602 mi
from Harlingen, TX to Barstow, CA
That's the driving distance. It would take 1 day 3 hours to go from Harlingen, Texas to Barstow, California.
The flight distance (direct flight from Harlingen, TX to Barstow, CA) is 1,294.27 mi.
1,602 mi = 2,578.92 kms