Morgan Hook scored 16 points and No. 13 Oklahoma pulled away in the second half for a 74-49 victory over Hawaii.
The game was part of the three-day Rainbow Wahine Showdown. The Sooners (5-1) defeated Arkansas and Oregon in the previous two days.
Maddie Manning and Aaryn Ellenberg scored 12 points apiece for Oklahoma and Whitney Hand added 10 points. Ellenberg, who scored 27 points in Saturday's win over Oregon, hit four 3-pointers on Sunday.
It was 28-25 Sooners at halftime. Hawaii stayed close until Oklahoma took a double-digit lead with just under 13 minutes to play and pulled away.
Kamilah Martin had 11 points and 10 rebounds for Hawaii (2-5), which beat Oregon on Friday and lost to Arkansas Saturday.