There are
2,069 mi
from Chatham, IL to Mendota, CA
That's the driving distance. It would take 1 day 12 hours to go from Chatham, Illinois to Mendota, California.
The flight distance (direct flight from Chatham, IL to Mendota, CA) is 1,669.37 mi.
2,069 mi = 3,329.55 kms