| 1. Jornada | 01.03.2021 | Seongnam FC | - | Jeju United | 0:0 | ||||
| 2. Jornada | 06.03.2021 | Jeju United | - | Jeonbuk FC | 1:1 |  |
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| 3. Jornada | 09.03.2021 | Jeju United | - | Pohang Steelers | 1:0 | ||||
| 4. Jornada | 13.03.2021 | Daegu FC | - | Jeju United | 1:1 | ||||
| 5. Jornada | 16.03.2021 | Ulsan Hyundai FC | - | Jeju United | 0:0 | ||||
| 6. Jornada | 20.03.2021 | Jeju United | - | Gwangju FC | 1:1 | ||||
| 7. Jornada | 04.04.2021 | Suwon FC | - | Jeju United | 2:1 | ||||
| 13. Jornada | 02.05.2021 | Jeonbuk FC | - | Jeju United | 1:1 | ||||
| 16. Jornada | 16.05.2021 | Jeju United | - | Daegu FC | 1:2 | |
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| 17. Jornada | 19.05.2021 | Gwangju FC | - | Jeju United | 0:0 | |
Corea del Sur