| 2026-09-26 | UFC Fight Night: Rosas Jr. vs. Barcelos | Women’s Bantamweight | Ailín Pérez def. Norma Dumont | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2026-02-28 | UFC Fight Night: Moreno vs. Kavanagh | Women’s Bantamweight | Ailín Pérez def. Macy Chiasson | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2025-01-18 | UFC 311: Makhachev vs. Moicano | Women’s Bantamweight | Ailín Pérez def. Karol Rosa | Decision (unanimous) (29–28, 29–28, 30–27) | 3 | 5:00 |
| 2024-09-28 | UFC Fight Night: Moicano vs. Saint Denis | Catchweight | Ailín Pérez def. Darya Zheleznyakova | Submission (arm-triangle choke) | 1 | 3:52 |
| 2024-06-01 | UFC 302: Makhachev vs. Poirier | Women’s Bantamweight | Ailín Pérez def. Joselyne Edwards | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2023-11-18 | UFC Fight Night: Allen vs. Craig | Women’s Bantamweight | Ailín Pérez def. Lucie Pudilová | Decision (unanimous) (29–27, 29–28, 29–28) | 3 | 5:00 |
| 2023-07-15 | UFC on ESPN: Holm vs. Bueno Silva | Women’s Bantamweight | Ailín Pérez def. Ashlee Evans-Smith | Decision (unanimous) (30–25, 30–25, 30–26) | 3 | 5:00 |
| 2022-09-03 | UFC Fight Night: Gane vs. Tuivasa | Women’s Featherweight | Stephanie Egger def. Ailín Pérez | Submission (rear-naked choke) | 2 | 4:54 |