There are
1,897 mi
from Chatham, IL to Walnut, CA
That's the driving distance. It would take 1 day 9 hours to go from Chatham, Illinois to Walnut, California.
The flight distance (direct flight from Chatham, IL to Walnut, CA) is 1,598.09 mi.
1,897 mi = 3,053.56 kms