There are
1,218 mi
from Hereford, TX to Mendota, CA
That's the driving distance. It would take 21 hours 20 mins to go from Hereford, Texas to Mendota, California.
The flight distance (direct flight from Hereford, TX to Mendota, CA) is 1,015.33 mi.
1,218 mi = 1,960.55 kms