Miles between Decatur, IL and Ada, OK

There are
629 mi
from Decatur, IL to Ada, OK

That's the driving distance. It would take 11 hours 43 mins to go from Decatur, Illinois to Ada, Oklahoma.

The flight distance (direct flight from Decatur, IL to Ada, OK) is 549.77 mi.

629 mi = 1,012.48 kms