| 1. Ronde | 03.03.2018 | Gangwon FC | - | Incheon United | 2:1 | ||||
| 2. Ronde | 10.03.2018 | Incheon United | - | Jeonbuk FC | 3:2 | ||||
| 3. Ronde | 17.03.2018 | Incheon United | - | Daegu FC | 0:0 | ||||
| 4. Ronde | 01.04.2018 | FC Seoul | - | Incheon United | 1:1 | ||||
| 5. Ronde | 07.04.2018 | Incheon United | - | Jeonnam Dragons | 2:2 | ||||
| 6. Ronde | 11.04.2018 | Incheon United | - | Sangju Sangmu | 0:1 | ||||
| 7. Ronde | 14.04.2018 | Jeju United | - | Incheon United | 4:2 | ||||
| 9. Ronde | 25.04.2018 | Ulsan Hyundai FC | - | Incheon United | 2:1 | ||||
| 10. Ronde | 29.04.2018 | Incheon United | - | Gyeongnam FC | 2:3 |  |
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| 11. Ronde | 02.05.2018 | Pohang Steelers | - | Incheon United | 0:0 | ||||
| 12. Ronde | 05.05.2018 | Incheon United | - | Jeju United | 1:2 | ||||
| 14. Ronde | 20.05.2018 | Incheon United | - | Ulsan Hyundai FC | 1:1 | ||||
| 22. Ronde | 11.08.2018 | Daegu FC | - | Incheon United | 2:1 | ||||
| 23. Ronde | 15.08.2018 | Incheon United | - | Sangju Sangmu | 0:0 | ||||
| 24. Ronde | 19.08.2018 | Gangwon FC | - | Incheon United | 7:0 | |
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| 25. Ronde | 22.08.2018 | Incheon United | - | Jeonnam Dragons | 3:1 | ||||
| 26. Ronde | 25.08.2018 | Jeju United | - | Incheon United | 0:0 | ||||
| 27. Ronde | 02.09.2018 | Incheon United | - | Ulsan Hyundai FC | 3:2 |
Zuid-Korea