| 1. Round | 28/08/2022 | Real Unión | - | UE Cornellà | 2:0 | ||||
| 3. Round | 11/09/2022 | Real Unión | - | UD Logroñés | 0:3 | ||||
| 4. Round | 18/09/2022 | CD Eldense | - | Real Unión | 2:0 | ||||
| 5. Round | 25/09/2022 | Real Unión | - | CD Alcoyano | 1:2 | ||||
| 7. Round | 09/10/2022 | Real Unión | - | SD Amorebieta | 4:3 |  |
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| 8. Round | 16/10/2022 | Real Murcia | - | Real Unión | 0:0 | ||||
| 9. Round | 22/10/2022 | Real Unión | - | Real Sociedad B | 0:1 | ||||
| 10. Round | 30/10/2022 | CD Calahorra | - | Real Unión | 3:0 | ||||
| 11. Round | 06/11/2022 | Real Unión | - | SD Logroñés | 1:1 | ||||
| 13. Round | 27/11/2022 | Real Unión | - | Gimnàstic de Tarragona | 2:3 | ||||
| 14. Round | 04/12/2022 | CD Numancia | - | Real Unión | 0:2 | ||||
| 18. Round | 08/01/2023 | Real Unión | - | CD Castellón | 1:1 | ||||
| 19. Round | 15/01/2023 | Athletic Club B | - | Real Unión | 0:1 | ||||
| 20. Round | 21/01/2023 | Real Unión | - | CD Eldense | 0:1 | ||||
| 23. Round | 11/02/2023 | Real Sociedad B | - | Real Unión | 2:0 | |
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| 29. Round | 26/03/2023 | UE Cornellà | - | Real Unión | 1:1 | ||||
| 32. Round | 16/04/2023 | UD Logroñés | - | Real Unión | 1:0 | ||||
| 33. Round | 22/04/2023 | Real Unión | - | Athletic Club B | 2:1 | ||||
| 34. Round | 30/04/2023 | Gimnàstic de Tarragona | - | Real Unión | 0:1 | |
Spain