1. Round | 03/03/2018 | Gangwon FC | - | Incheon United | 2:1 | ||||
2. Round | 10/03/2018 | Incheon United | - | Jeonbuk FC | 3:2 | ||||
3. Round | 17/03/2018 | Incheon United | - | Daegu FC | 0:0 | ||||
4. Round | 01/04/2018 | FC Seoul | - | Incheon United | 1:1 | ||||
5. Round | 07/04/2018 | Incheon United | - | Jeonnam Dragons | 2:2 | ||||
6. Round | 11/04/2018 | Incheon United | - | Sangju Sangmu | 0:1 | ||||
7. Round | 14/04/2018 | Jeju United | - | Incheon United | 4:2 | ||||
8. Round | 22/04/2018 | Incheon United | - | Suwon Bluewings | 2:3 | ||||
13. Round | 13/05/2018 | Sangju Sangmu | - | Incheon United | 3:2 | ||||
14. Round | 20/05/2018 | Incheon United | - | Ulsan Hyundai FC | 1:1 |