Miles between Tulsa, OK and Merrillville, IN

There are
694 mi
from Tulsa, OK to Merrillville, IN

That's the driving distance. It would take 12 hours 54 mins to go from Tulsa, Oklahoma to Merrillville, Indiana.

The flight distance (direct flight from Tulsa, OK to Merrillville, IN) is 593.53 mi.

694 mi = 1,117.36 kms