There are
2,885 mi
from Union, NJ to Petaluma, CA
That's the driving distance. It would take 2 days 2 hours to go from Union, New Jersey to Petaluma, California.
The flight distance (direct flight from Union, NJ to Petaluma, CA) is 2,553.18 mi.
2,885 mi = 4,643.20 kms