I thought it was at least a 4 seed but a higher seed bumps, like OU and Memphis bumped Kansas in KC. So it depends who is close and how they are seeded.
That's what I always thought since they went to the pod system. But then an 8-seed Ohio State was allowed to play in Dayton this year. Columbus to Dayton is 72 miles, which is obviously further than Norman-OKC. But it still seemed to be in contrast to what I thought the committee's general guidelines were for such a low seed. (Of course, in hindsight, it didn't do them any good since Siena beat them in the first round.)