| 2026-05-16 | UFC Fight Night: Allen vs. Costa | Women’s Bantamweight | Ketlen Vieira def. Jacqueline Cavalcanti | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2025-11-01 | UFC Fight Night: Garcia vs. Onama | Women’s Bantamweight | Norma Dumont def. Ketlen Vieira | Decision (split) (29–28, 28–29, 29–28) | 3 | 5:00 |
| 2025-05-31 | UFC on ESPN: Gamrot vs. Klein | Women’s Featherweight | Ketlen Vieira def. Macy Chiasson | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2024-10-05 | UFC 307: Pereira vs. Rountree Jr. | Women’s Bantamweight | Kayla Harrison def. Ketlen Vieira | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2023-07-22 | UFC Fight Night: Aspinall vs. Tybura | Women’s Bantamweight | Ketlen Vieira def. Pannie Kianzad | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2023-01-14 | UFC Fight Night: Strickland vs. Imavov | Women’s Bantamweight | Raquel Pennington def. Ketlen Vieira | Decision (split) (29–28, 28–29, 29–28) | 3 | 5:00 |
| 2022-05-21 | UFC Fight Night: Holm vs. Vieira | Women’s Bantamweight | Ketlen Vieira def. Holly Holm | Decision (split) (47–48, 48–47, 48–47) | 5 | 5:00 |
| 2021-11-20 | UFC Fight Night: Vieira vs. Tate | Women’s Bantamweight | Ketlen Vieira def. Miesha Tate | Decision (unanimous) (48–47, 48–47, 49–46) | 5 | 5:00 |
| 2021-02-20 | UFC Fight Night: Blaydes vs. Lewis | Catchweight | Yana Kunitskaya def. Ketlen Vieira | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2020-09-27 | UFC 253: Adesanya vs. Costa | Women’s Bantamweight | Ketlen Vieira def. Sijara Eubanks | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2019-12-14 | UFC 245: Usman vs. Covington | Women’s Bantamweight | Irene Aldana def. Ketlen Vieira | KO (punches) | 1 | 4:51 |
| 2018-03-03 | UFC 222: Cyborg vs. Kunitskaya | Women’s Bantamweight | Ketlen Vieira def. Cat Zingano | Decision (split) (29–28, 28–29, 29–28) | 3 | 5:00 |
| 2017-09-09 | UFC 215: Nunes vs. Shevchenko 2 | Women’s Bantamweight | Ketlen Vieira def. Sara McMann | Submission (arm-triangle choke) | 2 | 4:16 |
| 2017-04-15 | UFC on Fox: Johnson vs. Reis | Women’s Bantamweight | Ketlen Vieira def. Ashlee Evans-Smith | Decision (unanimous) (29–28, 29–28, 30–27) | 3 | 5:00 |
| 2016-10-01 | UFC Fight Night: Lineker vs. Dodson | Women’s Bantamweight | Ketlen Vieira def. Kelly Faszholz | Decision (split) (28–29, 29–28, 29–28) | 3 | 5:00 |