There are
1,366 mi
from Hereford, TX to Pacifica, CA
That's the driving distance. It would take 1 day to go from Hereford, Texas to Pacifica, California.
The flight distance (direct flight from Hereford, TX to Pacifica, CA) is 1,134.16 mi.
1,366 mi = 2,197.75 kms