This may disappoint you but there really isn't an answer to this question as there's an odd number of miles between these and only these two cities in the U.S. Either you're slightly closer to one city or another and really can't be exactly at a particular point inbetween. Example.....1,500 miles Either you're 800 miles from one city or 700 miles from another. Maybe you should decide to meet along the interstate somewhere where they serve good coffee and forget meeting exactly inbetween. If you've quite drinking coffee then have a soda.
Galena, OH
The halfway point between Gulfport, Mississippi and Tulsa, Oklahoma is Varner, Arkansas. There is approximately 564 miles between Tulsa and Gulfport.
Tulsa, Oklahoma is close to the halfway point and is certainly worthy of a visit.
Somewhere near Tulsa, Oklahoma.
The town of Broken Arrow, Oklahoma is the halfway point. Tulsa, Oklahoma is approximately 13 miles from the exact midpoint.
The halfway point between Tulsa, Oklahoma, and Vicksburg, Mississippi, is Conway, Arkansas, if you're going via Fort Smith, Little Rock, and Pine Bluff.
The exact halfway point is the corner of Ecorse Road and Middlebelt, but that is on a straight line between Wyandotte and Canton.
Mullikin Junction, KY
The halfway point between Tulsa, OK and Fort Campbell, KY falls in or around Mountain View, MO.
Des Monien Iowa
Edwardsville, IL
Terre Haute, Indiana