| 1. Round | 06/08/2023 | Leeds United | - | Cardiff City | 2:2 | ||||
| 3. Round | 19/08/2023 | Leicester City | - | Cardiff City | 2:1 |  |
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| 8. Round | 24/09/2023 | Sunderland AFC | - | Cardiff City | 0:1 | ||||
| 10. Round | 03/10/2023 | Middlesbrough FC | - | Cardiff City | 2:0 | ||||
| 14. Round | 28/10/2023 | Cardiff City | - | Bristol City | 2:0 | ||||
| 16. Round | 11/11/2023 | Cardiff City | - | Norwich City | 2:3 | ||||
| 18. Round | 28/11/2023 | Cardiff City | - | West Bromwich Albion | 0:1 | ||||
| 21. Round | 13/12/2023 | Cardiff City | - | Birmingham City | 0:1 | ||||
| 28. Round | 20/01/2024 | Plymouth Argyle | - | Cardiff City | 3:1 | ||||
| 30. Round | 03/02/2024 | Watford FC | - | Cardiff City | 0:1 | ||||
| 33. Round | 17/02/2024 | Norwich City | - | Cardiff City | 4:1 | ||||
| 29. Round | 20/02/2024 | Cardiff City | - | Blackburn Rovers | 0:0 | ||||
| 44. Round | 20/04/2024 | Cardiff City | - | Southampton FC | 2:1 | ||||
| 45. Round | 27/04/2024 | Cardiff City | - | Middlesbrough FC | 1:4 | ||||
| 46. Round | 04/05/2024 | Rotherham United | - | Cardiff City | 5:2 |
England