| 5. Round | 18/08/2018 | Wisła Płock | - | Arka Gdynia | 1:3 | ||||
| 7. Round | 01/09/2018 | Arka Gdynia | - | Zagłębie Sosnowiec | 2:2 | ||||
| 9. Round | 21/09/2018 | Arka Gdynia | - | Lech Poznań | 1:0 | ||||
| 10. Round | 28/09/2018 | Legia Warszawa | - | Arka Gdynia | 1:1 | ||||
| 11. Round | 07/10/2018 | Arka Gdynia | - | Zagłębie Lubin | 3:1 | ||||
| 12. Round | 20/10/2018 | Śląsk Wrocław | - | Arka Gdynia | 1:2 | ||||
| 13. Round | 27/10/2018 | Lechia Gdańsk | - | Arka Gdynia | 2:1 | ||||
| 14. Round | 02/11/2018 | Arka Gdynia | - | Pogoń Szczecin | 2:3 | ||||
| 15. Round | 11/11/2018 | Miedź Legnica | - | Arka Gdynia | 0:4 | ||||
| 16. Round | 26/11/2018 | Arka Gdynia | - | Wisła Kraków | 4:1 | ||||
| 17. Round | 30/11/2018 | Jagiellonia Białystok | - | Arka Gdynia | 3:1 | ||||
| 19. Round | 15/12/2018 | Górnik Zabrze | - | Arka Gdynia | 1:1 |  |
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| 20. Round | 21/12/2018 | Arka Gdynia | - | Wisła Płock | 3:3 |  |
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| 22. Round | 16/02/2019 | Zagłębie Sosnowiec | - | Arka Gdynia | 3:2 | ||||
| 23. Round | 22/02/2019 | Arka Gdynia | - | Piast Gliwice | 1:2 | ||||
| 24. Round | 03/03/2019 | Lech Poznań | - | Arka Gdynia | 1:0 | ||||
| 29. Round | 07/04/2019 | Pogoń Szczecin | - | Arka Gdynia | 3:3 | ||||
| 30. Round | 13/04/2019 | Arka Gdynia | - | Miedź Legnica | 1:1 |
Poland