There are
1,668 mi
from Harlingen, TX to Ventura, CA
That's the driving distance. It would take 1 day 5 hours to go from Harlingen, Texas to Ventura, California.
The flight distance (direct flight from Harlingen, TX to Ventura, CA) is 1,397.77 mi.
1,668 mi = 2,684.78 kms