There are
1,972 mi
from The Dalles, OR to Cahokia, IL
That's the driving distance. It would take 1 day 9 hours to go from The Dalles, Oregon to Cahokia, Illinois.
The flight distance (direct flight from The Dalles, OR to Cahokia, IL) is 1,649.81 mi.
1,972 mi = 3,172.83 kms