There are
1,925 mi
from Chatham, IL to Santee, CA
That's the driving distance. It would take 1 day 9 hours to go from Chatham, Illinois to Santee, California.
The flight distance (direct flight from Chatham, IL to Santee, CA) is 1,583.95 mi.
1,925 mi = 3,097.88 kms