5. Round | 08/04/2018 | Jeju United | - | Sangju Sangmu | 0:0 | ||||
15. Round | 07/07/2018 | Suwon Bluewings | - | Jeju United | 2:3 | ||||
17. Round | 15/07/2018 | Jeju United | - | Daegu FC | 1:2 | ||||
18. Round | 18/07/2018 | Jeonbuk FC | - | Jeju United | 1:0 | ||||
29. Round | 23/09/2018 | Jeju United | - | Gangwon FC | 2:2 | ||||
31. Round | 29/09/2018 | Jeju United | - | Jeonnam Dragons | 1:0 | ||||
33. Round | 20/10/2018 | Jeju United | - | FC Seoul | 1:0 |