1. Round | 01/03/2018 | Jeju United | - | FC Seoul | 0:0 | ||||
2. Round | 10/03/2018 | Gyeongnam FC | - | Jeju United | 2:0 | ||||
6. Round | 11/04/2018 | Jeonnam Dragons | - | Jeju United | 0:3 | ||||
12. Round | 05/05/2018 | Incheon United | - | Jeju United | 1:2 | ||||
13. Round | 12/05/2018 | Jeju United | - | Jeonnam Dragons | 1:0 | ||||
14. Round | 20/05/2018 | Sangju Sangmu | - | Jeju United | 0:0 | ||||
15. Round | 07/07/2018 | Suwon Bluewings | - | Jeju United | 2:3 | ||||
16. Round | 11/07/2018 | Jeju United | - | Gyeongnam FC | 0:0 | ||||
19. Round | 21/07/2018 | Gangwon FC | - | Jeju United | 3:1 | ||||
22. Round | 11/08/2018 | Jeju United | - | Pohang Steelers | 0:0 | ||||
24. Round | 18/08/2018 | Sangju Sangmu | - | Jeju United | 1:1 | ||||
26. Round | 25/08/2018 | Jeju United | - | Incheon United | 0:0 | ||||
29. Round | 23/09/2018 | Jeju United | - | Gangwon FC | 2:2 | ||||
30. Round | 26/09/2018 | Ulsan Hyundai FC | - | Jeju United | 3:2 |