There are
1,396 mi
from Petaluma, CA to Hereford, TX
That's the driving distance. It would take 1 day to go from Petaluma, California to Hereford, Texas.
The flight distance (direct flight from Petaluma, CA to Hereford, TX) is 1,145.82 mi.
1,396 mi = 2,245.88 kms