There are
666 mi
from Champaign, IL to Choctaw, OK
That's the driving distance. It would take 12 hours 1 min to go from Champaign, Illinois to Choctaw, Oklahoma.
The flight distance (direct flight from Champaign, IL to Choctaw, OK) is 586.54 mi.
666 mi = 1,071.29 kms