| 18 Sept 18 | C. Good Curtis Good |  Newcastle UnitedNEW | → |  Melbourne City FCMCY | Free |
| 18 Sept 18 | C. Good Curtis Good | Newcastle UnitedNEW | → | Melbourne City FCMCY | Free |
| 07 Sept 18 | R. Aarons Rolando Aarons | Newcastle UnitedNEW | → | SLXSlovan LiberecSlovan Liberec | Loan |
| 31 Aug 18 | L. Charman Luke Charman | Newcastle UnitedNEW | → |  Accrington StanleyACCR | Loan |
| 31 Aug 18 | D. Barlaser Daniel Barlaser | Newcastle UnitedNEW | → | Accrington StanleyACCR | Loan |
| 25 Aug 18 | H. Saivet Henri Saivet | Newcastle UnitedNEW | → |  BursasporBUR | Loan |
| 09 Aug 18 | F. Fernández Federico Fernández |  Swansea CitySWA | → | Newcastle UnitedNEW | Undisclosed |
| 09 Aug 18 | I. Toney Ivan Toney | Newcastle UnitedNEW | → |  Peterborough UnitedPET | Undisclosed |
| 09 Aug 18 | F. Fernández Federico Fernández | Swansea CitySWA | → | Newcastle UnitedNEW | Undisclosed |
| 06 Aug 18 | A. Armstrong Adam Armstrong | Newcastle UnitedNEW | → |  Blackburn RoversBLK | Undisclosed |
| 06 Aug 18 | D. Gayle Dwight Gayle | Newcastle UnitedNEW | → |  West Bromwich AlbionWBA | Loan |
| 06 Aug 18 | S. Rondón Salomón Rondón | West Bromwich AlbionWBA | → | Newcastle UnitedNEW | Loan |
| 06 Aug 18 | S. Rondón Salomón Rondón | West Bromwich AlbionWBA | → | Newcastle UnitedNEW | Loan |
| 06 Aug 18 | D. Gayle Dwight Gayle | Newcastle UnitedNEW | → | West Bromwich AlbionWBA | Loan |
| 06 Aug 18 | A. Armstrong Adam Armstrong | Newcastle UnitedNEW | → | Blackburn RoversBLK | Undisclosed |
| 02 Aug 18 | Y. Muto Yoshinori Muto |  MainzMAIN | → | Newcastle UnitedNEW | Undisclosed |
| 02 Aug 18 | Y. Muto Yoshinori Muto | MainzMAIN | → | Newcastle UnitedNEW | Undisclosed |
| 30 Jul 18 | A. Mitrovic Aleksandar Mitrovic | Newcastle UnitedNEW | → |  FulhamFUL | Undisclosed |
| 26 Jul 18 | M. Sels Matz Sels | Newcastle UnitedNEW | → |  StrasbourgSTRA | Undisclosed |
| 26 Jul 18 | M. Sels Matz Sels | Newcastle UnitedNEW | → | StrasbourgSTRA | Undisclosed |
| 26 Jul 18 | F. Schär Fabian Schär |  Deportivo La CoruñaDEP | → | Newcastle UnitedNEW | Undisclosed |
| 23 Jul 18 | C. Mbemba Chancel Mbemba | Newcastle UnitedNEW | → |  FC PortoPOR | Undisclosed |
| 20 Jul 18 | J. Colback Jack Colback | Newcastle UnitedNEW | → |  Nottingham ForestFOR | Loan |
| 20 Jul 18 | J. Colback Jack Colback | Newcastle UnitedNEW | → | Nottingham ForestFOR | Loan |
| 12 Jul 18 | M. Merino Mikel Merino | Newcastle UnitedNEW | → |  Real SociedadRSO | Undisclosed |
| 12 Jul 18 | M. Merino Mikel Merino | Newcastle UnitedNEW | → | Real SociedadRSO | Undisclosed |
| 12 Jul 18 | Kenedy |  ChelseaCHE | → | Newcastle UnitedNEW | Loan |
| 01 Jul 18 | K. Sung-Yueng Ki Sung-Yueng | Swansea CitySWA | → | Newcastle UnitedNEW | Free |
| 01 Jul 18 | K. Sung-Yueng Ki Sung-Yueng | Swansea CitySWA | → | Newcastle UnitedNEW | Free |
| 08 Jun 18 | M. Dúbravka Martin Dúbravka | SPXSparta PragueSparta Prague | → | Newcastle UnitedNEW | Undisclosed |
| 31 Jan 18 | I. Slimani Islam Slimani |  Leicester CityLEI | → | Newcastle UnitedNEW | Loan |
| 31 Jan 18 | H. Saivet Henri Saivet | Newcastle UnitedNEW | → |  SivassporSIV | Loan |
| 31 Jan 18 | A. Mitrovic Aleksandar Mitrovic | Newcastle UnitedNEW | → | FulhamFUL | Loan |
| 31 Jan 18 | J. Colback Jack Colback | Newcastle UnitedNEW | → | Nottingham ForestFOR | Loan |
| 31 Jan 18 | A. Mitrovic Aleksandar Mitrovic | Newcastle UnitedNEW | → | FulhamFUL | Loan |
| 31 Jan 18 | M. Dúbravka Martin Dúbravka | SPXSparta PragueSparta Prague | → | Newcastle UnitedNEW | Loan |
| 31 Jan 18 | R. Aarons Rolando Aarons | Newcastle UnitedNEW | → |  Hellas VeronaVER | Loan |
| 31 Jan 18 | J. Colback Jack Colback | Newcastle UnitedNEW | → | Nottingham ForestFOR | Loan |
| 31 Jan 18 | F. Woodman Freddie Woodman | Newcastle UnitedNEW | → |  AberdeenABER | Loan |
| 31 Jan 18 | J. Sterry Jamie Sterry | Newcastle UnitedNEW | → |  Crewe AlexandraCREW | Loan |
| 31 Jan 18 | R. Aarons Rolando Aarons | Newcastle UnitedNEW | → | Hellas VeronaVER | Loan |
| 31 Jan 18 | F. Woodman Freddie Woodman | Newcastle UnitedNEW | → | AberdeenABER | Loan |
| 23 Jan 18 | Kenedy | ChelseaCHE | → | Newcastle UnitedNEW | Loan |
| 19 Jan 18 | D. Barlaser Daniel Barlaser | Newcastle UnitedNEW | → | Crewe AlexandraCREW | Loan |
| 11 Jan 18 | I. Toney Ivan Toney | Newcastle UnitedNEW | → |  Scunthorpe UnitedSCU | Loan |
| 09 Jan 18 | A. Armstrong Adam Armstrong | Newcastle UnitedNEW | → | Blackburn RoversBLK | Loan |
| 01 Jan 18 | M. Merino Mikel Merino |  Borussia DortmundDOR | → | Newcastle UnitedNEW | Undisclosed |
| 01 Jan 18 | M. Merino Mikel Merino | Borussia DortmundDOR | → | Newcastle UnitedNEW | Undisclosed |
| 01 Jan 18 | T. Krul Tim Krul | Newcastle UnitedNEW | → |  Brighton & Hove AlbionBHA | Free |