| 26 Nov 08 | J. Brown Jonathan Brown |  Cardiff CityCAR | → |  WrexhamWRX | Loan |
| 21 Nov 08 | W. Routledge Wayne Routledge |  Aston VillaAVL | → | Cardiff CityCAR | Loan |
| 21 Nov 08 | W. Routledge Wayne Routledge | Aston VillaAVL | → | Cardiff CityCAR | Loan |
| 06 Nov 08 | M. Chopra Michael Chopra |  SunderlandSUN | → | Cardiff CityCAR | Loan |
| 06 Nov 08 | M. Chopra Michael Chopra | SunderlandSUN | → | Cardiff CityCAR | Loan |
| 01 Sept 08 | S. Thompson Steven Thompson | Cardiff CityCAR | → |  BurnleyBUR | Free |
| 22 Aug 08 | E. Johnson Eddie Johnson |  FulhamFUL | → | Cardiff CityCAR | Loan |
| 22 Aug 08 | E. Johnson Eddie Johnson | FulhamFUL | → | Cardiff CityCAR | Loan |
| 19 Aug 08 | G. Gyepes Gabor Gyepes |  Northampton TownNHT | → | Cardiff CityCAR | Undisclosed |
| 16 Aug 08 | G. Loovens Glenn Loovens | Cardiff CityCAR | → |  CelticCEL | Undisclosed |
| 16 Aug 08 | G. Loovens Glenn Loovens | Cardiff CityCAR | → | CelticCEL | Undisclosed |
| 05 Aug 08 | J. Bothroyd Jay Bothroyd |  Wolverhampton WanderersWOL | → | Cardiff CityCAR | Undisclosed |
| 10 Jul 08 | M. Kennedy Mark Kennedy |  Crystal PalaceCRY | → | Cardiff CityCAR | Free |
| 07 Jul 08 | W. Feeney Warren Feeney | Cardiff CityCAR | → |  Dundee UnitedDUN | Loan |
| 07 Jul 08 | W. Feeney Warren Feeney | Cardiff CityCAR | → | Dundee UnitedDUN | Loan |
| 01 Jul 08 | D. Dennehy Darren Dennehy |  EvertonEVE | → | Cardiff CityCAR | Free |
| 01 Jul 08 | D. Dennehy Darren Dennehy | EvertonEVE | → | Cardiff CityCAR | Free |
| 01 Jul 08 | R. McCormack Ross McCormack |  MotherwellMOT | → | Cardiff CityCAR | Free |
| 01 Jul 08 | R. McCormack Ross McCormack | MotherwellMOT | → | Cardiff CityCAR | Free |
| 13 Jun 08 | A. Ramsey Aaron Ramsey | Cardiff CityCAR | → |  ArsenalARS | Undisclosed |
| 13 Jun 08 | A. Ramsey Aaron Ramsey | Cardiff CityCAR | → | ArsenalARS | Undisclosed |
| 05 Jun 08 | D. Forde David Forde | Cardiff CityCAR | → |  MillwallMIL | Free |
| 06 Mar 08 | D. Forde David Forde | Cardiff CityCAR | → |  AFC BournemouthBOU | Loan |
| 25 Jan 08 | M. Green Matt Green | Cardiff CityCAR | → |  Oxford UnitedOXF | Loan |
| 18 Jan 08 | S. MacLean Steven MacLean | Cardiff CityCAR | → |  Plymouth ArgylePLY | 500000 |
| 10 Jan 08 | P. Enckelman Peter Enckelman |  Blackburn RoversBLK | → | Cardiff CityCAR | Loan |
| 10 Jan 08 | P. Enckelman Peter Enckelman | Blackburn RoversBLK | → | Cardiff CityCAR | Loan |
| 08 Jan 08 | J. Byrne Jason Byrne | Cardiff CityCAR | → | BXXBohemiansBohemians | Free |
| 01 Jan 08 | C. Gunter Chris Gunter | Cardiff CityCAR | → |  Tottenham HotspurTOT | Undisclosed |
| 01 Jan 08 | C. Gunter Chris Gunter | Cardiff CityCAR | → | Tottenham HotspurTOT | Undisclosed |