Miles between Markham, IL and Duncan, OK

There are
858 mi
from Markham, IL to Duncan, OK

That's the driving distance. It would take 15 hours 38 mins to go from Markham, Illinois to Duncan, Oklahoma.

The flight distance (direct flight from Markham, IL to Duncan, OK) is 741.92 mi.

858 mi = 1,381.51 kms