3. Round | 18/03/2018 | Ulsan Hyundai FC | - | Jeju United | 0:1 | ||||
5. Round | 08/04/2018 | Jeju United | - | Sangju Sangmu | 0:0 | ||||
6. Round | 11/04/2018 | Jeonnam Dragons | - | Jeju United | 0:3 | ||||
9. Round | 25/04/2018 | Pohang Steelers | - | Jeju United | 0:1 | ||||
10. Round | 28/04/2018 | Daegu FC | - | Jeju United | 1:4 | ||||
11. Round | 02/05/2018 | Jeju United | - | Gangwon FC | 3:5 |