There are
1,935 mi
from Chatham, IL to Poway, CA
That's the driving distance. It would take 1 day 10 hours to go from Chatham, Illinois to Poway, California.
The flight distance (direct flight from Chatham, IL to Poway, CA) is 1,583.58 mi.
1,935 mi = 3,114.39 kms