There are
1,401 mi
from Petaluma, CA to Amarillo, TX
That's the driving distance. It would take 1 day to go from Petaluma, California to Amarillo, Texas.
The flight distance (direct flight from Petaluma, CA to Amarillo, TX) is 1,168.22 mi.
1,401 mi = 2,254.52 kms