1. Round | 01/03/2018 | Jeju United | - | FC Seoul | 0:0 | ||||
2. Round | 11/03/2018 | FC Seoul | - | Gangwon FC | 1:2 | ||||
3. Round | 18/03/2018 | Jeonbuk FC | - | FC Seoul | 2:1 | ||||
4. Round | 01/04/2018 | FC Seoul | - | Incheon United | 1:1 | ||||
5. Round | 08/04/2018 | Suwon Bluewings | - | FC Seoul | 0:0 | ||||
6. Round | 11/04/2018 | FC Seoul | - | Pohang Steelers | 2:1 | ||||
7. Round | 14/04/2018 | Ulsan Hyundai FC | - | FC Seoul | 1:0 | ||||
8. Round | 21/04/2018 | FC Seoul | - | Daegu FC | 3:0 | ||||
9. Round | 25/04/2018 | Jeonnam Dragons | - | FC Seoul | 2:1 | ||||
10. Round | 28/04/2018 | FC Seoul | - | Sangju Sangmu | 0:0 | ||||
11. Round | 02/05/2018 | Gyeongnam FC | - | FC Seoul | 0:0 | ||||
12. Round | 05/05/2018 | FC Seoul | - | Suwon Bluewings | 2:1 | ||||
28. Round | 16/09/2018 | FC Seoul | - | Daegu FC | 0:2 | ||||
29. Round | 22/09/2018 | Gyeongnam FC | - | FC Seoul | 2:1 | ||||
30. Round | 26/09/2018 | FC Seoul | - | Incheon United | 1:1 | ||||
31. Round | 30/09/2018 | FC Seoul | - | Sangju Sangmu | 2:2 | ||||
33. Round | 20/10/2018 | Jeju United | - | FC Seoul | 1:0 |