There are
1,827 mi
from Pendleton, OR to Chatham, IL
That's the driving distance. It would take 1 day 7 hours to go from Pendleton, Oregon to Chatham, Illinois.
The flight distance (direct flight from Pendleton, OR to Chatham, IL) is 1,525.02 mi.
1,827 mi = 2,940.78 kms