There are
888 mi
from Bellingham, WA to Petaluma, CA
That's the driving distance. It would take 17 hours 18 mins to go from Bellingham, Washington to Petaluma, California.
The flight distance (direct flight from Bellingham, WA to Petaluma, CA) is 727.40 mi.
888 mi = 1,428.77 kms