There are
1,978 mi
from The Dalles, OR to Dekalb, IL
That's the driving distance. It would take 1 day 9 hours to go from The Dalles, Oregon to Dekalb, Illinois.
The flight distance (direct flight from The Dalles, OR to Dekalb, IL) is 1,626.51 mi.
1,978 mi = 3,183.58 kms