| 23. Round | 11/02/2024 | CF Fuenlabrada | - | Sestao River | 3:1 | ||||
| 24. Round | 18/02/2024 | Sestao River | - | Gimnàstic de Tarragona | 1:1 | ||||
| 25. Round | 24/02/2024 | RC Celta B | - | Sestao River | 4:0 | ||||
| 27. Round | 09/03/2024 | FC Barcelona B | - | Sestao River | 2:1 | ||||
| 28. Round | 16/03/2024 | Sestao River | - | SD Logroñés | 2:0 | ||||
| 31. Round | 06/04/2024 | Real Sociedad B | - | Sestao River | 2:3 |  |
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| 32. Round | 13/04/2024 | Sestao River | - | Real Unión | 3:1 | ||||
| 36. Round | 12/05/2024 | CA Osasuna B | - | Sestao River | 0:1 | ||||
| 38. Round | 25/05/2024 | Cultural Leonesa | - | Sestao River | 0:1 |
Spain