| 20. Jornada | 01.07.2023 | Jeonbuk FC | - | Jeju United | 2:0 | ||||
| 21. Jornada | 07.07.2023 | Jeju United | - | Daegu FC | 1:2 |  |
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| 22. Jornada | 11.07.2023 | Jeju United | - | Gwangju FC | 0:0 | ||||
| 23. Jornada | 16.07.2023 | Pohang Steelers | - | Jeju United | 4:2 | |
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| 24. Jornada | 21.07.2023 | Ulsan Hyundai FC | - | Jeju United | 2:1 | ||||
| 25. Jornada | 06.08.2023 | Jeju United | - | Gangwon FC | 1:1 | ||||
| 26. Jornada | 12.08.2023 | Jeju United | - | Suwon FC | 3:0 | ||||
| 30. Jornada | 16.09.2023 | Incheon United | - | Jeju United | 2:1 | ||||
| 31. Jornada | 23.09.2023 | Jeju United | - | FC Seoul | 1:3 | ||||
| 32. Jornada | 01.10.2023 | Jeju United | - | Gwangju FC | 1:2 | ||||
| 33. Jornada | 08.10.2023 | Daejeon Hana Citizen | - | Jeju United | 1:0 |
Corea del Sur