There are
1,506 mi
from Harlingen, TX to Twentynine Palms, CA
That's the driving distance. It would take 1 day 2 hours to go from Harlingen, Texas to Twentynine Palms, California.
The flight distance (direct flight from Harlingen, TX to Twentynine Palms, CA) is 1,223.73 mi.
1,506 mi = 2,424.07 kms