There are
2,034 mi
from Chatham, IL to Petaluma, CA
That's the driving distance. It would take 1 day 11 hours to go from Chatham, Illinois to Petaluma, California.
The flight distance (direct flight from Chatham, IL to Petaluma, CA) is 1,762.35 mi.
2,034 mi = 3,273.98 kms