Since they share a common border, a halfway point does not exist.
Yes
The halfway point between Tulsa, Oklahoma, and Vicksburg, Mississippi, is Conway, Arkansas, if you're going via Fort Smith, Little Rock, and Pine Bluff.
A halfway point between Oklahoma City, Oklahoma and Cheyenne, Wyoming would be Collyer, Nebraska.
what is the halfway point from miami to oklahoma city
The halfway point between Gulfport, Mississippi and Tulsa, Oklahoma is Varner, Arkansas. There is approximately 564 miles between Tulsa and Gulfport.
One big city that is halfway between California and Ohio is Amarillo, TX. Another is Oklahoma City, Oklahoma. Not as big but almost exactly halfway is Elk City, Oklahoma.
Memphis
Oklahoma City, Oklahoma is about half way.
Mississippi
The halfway point is Clinton, Oklahoma.
Gallup, New Mexico is about halfway.
Between Glasgow, Kentucky and Louisiana the halfway point is Como Mississippi.