16. Round | 11/07/2018 | Incheon United | - | Gangwon FC | 3:3 | ||||
17. Round | 14/07/2018 | Gyeongnam FC | - | Incheon United | 3:0 | ||||
18. Round | 18/07/2018 | Suwon Bluewings | - | Incheon United | 5:2 | ||||
19. Round | 22/07/2018 | Incheon United | - | FC Seoul | 2:1 | ||||
20. Round | 28/07/2018 | Jeonnam Dragons | - | Incheon United | 1:3 | ||||
30. Round | 26/09/2018 | FC Seoul | - | Incheon United | 1:1 | ||||
31. Round | 30/09/2018 | Incheon United | - | Gyeongnam FC | 2:2 | ||||
32. Round | 06/10/2018 | Daegu FC | - | Incheon United | 1:2 | ||||
33. Round | 20/10/2018 | Jeonbuk FC | - | Incheon United | 3:2 |