| 4. Round | 17/09/2023 | Rayo Majadahonda | - | RC Celta B | 1:1 | ||||
| 5. Round | 24/09/2023 | SD Logroñés | - | Rayo Majadahonda | 0:1 | ||||
| 6. Round | 30/09/2023 | Rayo Majadahonda | - | CD Teruel | 0:0 | ||||
| 7. Round | 08/10/2023 | Cultural Leonesa | - | Rayo Majadahonda | 2:1 | ||||
| 9. Round | 22/10/2023 | Rayo Majadahonda | - | CD Lugo | 1:2 | ||||
| 11. Round | 04/11/2023 | Rayo Majadahonda | - | FC Barcelona B | 1:2 | ||||
| 12. Round | 12/11/2023 | SD Ponferradina | - | Rayo Majadahonda | 1:0 | ||||
| 13. Round | 19/11/2023 | CA Osasuna B | - | Rayo Majadahonda | 1:1 | ||||
| 14. Round | 26/11/2023 | Rayo Majadahonda | - | Sestao River | 0:2 | ||||
| 17. Round | 16/12/2023 | SD Tarazona | - | Rayo Majadahonda | 2:0 |
Spain