Miles between Decatur, IL and Duncan, OK

There are
696 mi
from Decatur, IL to Duncan, OK

That's the driving distance. It would take 12 hours 55 mins to go from Decatur, Illinois to Duncan, Oklahoma.

The flight distance (direct flight from Decatur, IL to Duncan, OK) is 617.29 mi.

696 mi = 1,119.75 kms