| 2. Jornada | 10.03.2018 | Gyeongnam FC | - | Jeju United | 2:0 | ||||
| 4. Jornada | 31.03.2018 | Jeju United | - | Suwon Bluewings | 0:1 | ||||
| 10. Jornada | 28.04.2018 | Daegu FC | - | Jeju United | 1:4 |  |
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| 12. Jornada | 05.05.2018 | Incheon United | - | Jeju United | 1:2 | ||||
| 15. Jornada | 07.07.2018 | Suwon Bluewings | - | Jeju United | 2:3 | ||||
| 17. Jornada | 15.07.2018 | Jeju United | - | Daegu FC | 1:2 |
Brasil