| 02 Sept 19 | C. Borthwick-Jackson Cameron Borthwick-Jackson |  Manchester UnitedMAN | → |  Tranmere RoversTRN | Loan |
| 02 Sept 19 | L. O'Connor Lee O'Connor | Manchester UnitedMAN | → |  CelticCEL | Undisclosed |
| 02 Sept 19 | M. Darmian Matteo Darmian | Manchester UnitedMAN | → |  ParmaPAR | Undisclosed |
| 02 Sept 19 | M. Darmian Matteo Darmian | Manchester UnitedMAN | → | ParmaPAR | Undisclosed |
| 02 Sept 19 | L. O'Connor Lee O'Connor | Manchester UnitedMAN | → | CelticCEL | Undisclosed |
| 30 Aug 19 | C. Smalling Chris Smalling | Manchester UnitedMAN | → |  AS RomaROMA | Loan |
| 30 Aug 19 | C. Smalling Chris Smalling | Manchester UnitedMAN | → | AS RomaROMA | Loan |
| 29 Aug 19 | A. Sánchez Alexis Sánchez | Manchester UnitedMAN | → |  InternazionaleINT | Loan |
| 29 Aug 19 | A. Sánchez Alexis Sánchez | Manchester UnitedMAN | → | InternazionaleINT | Loan |
| 16 Aug 19 | E. Hamilton Ethan Hamilton | Manchester UnitedMAN | → |  Southend UnitedSOUT | Loan |
| 13 Aug 19 | J. Pereira Joel Pereira | Manchester UnitedMAN | → |  Heart of MidlothianHOM | Loan |
| 13 Aug 19 | J. Pereira Joel Pereira | Manchester UnitedMAN | → | Heart of MidlothianHOM | Loan |
| 12 Aug 19 | G. Tanner George Tanner | Manchester UnitedMAN | → |  MorecambeMOR | Loan |
| 08 Aug 19 | R. Lukaku Romelu Lukaku | Manchester UnitedMAN | → | InternazionaleINT | Undisclosed |
| 08 Aug 19 | R. Lukaku Romelu Lukaku | Manchester UnitedMAN | → | InternazionaleINT | Undisclosed |
| 05 Aug 19 | H. Maguire Harry Maguire |  Leicester CityLEI | → | Manchester UnitedMAN | Undisclosed |
| 26 Jul 19 | D. Henderson Dean Henderson | Manchester UnitedMAN | → |  Sheffield UnitedSHU | Loan |
| 08 Jul 19 | K. O'Hara Kieran O'Hara | Manchester UnitedMAN | → |  Burton AlbionBRT | Loan |
| 05 Jul 19 | M. Olosunde Matthew Olosunde | Manchester UnitedMAN | → |  Rotherham UnitedROT | Free |
| 04 Jul 19 | A. Herrera Ander Herrera | Manchester UnitedMAN | → |  Paris Saint-Germain PSG | Free |
| 04 Jul 19 | A. Herrera Ander Herrera | Manchester UnitedMAN | → | Paris Saint-Germain PSG | Free |
| 03 Jul 19 | J. Wilson James Wilson | Manchester UnitedMAN | → |  AberdeenABER | Free |
| 03 Jul 19 | J. Wilson James Wilson | Manchester UnitedMAN | → | AberdeenABER | Free |
| 01 Jul 19 | A. Valencia Antonio Valencia | Manchester UnitedMAN | → |  Liga de QuitoLDU | Free |
| 29 Jun 19 | A. Wan-Bissaka Aaron Wan-Bissaka |  Crystal PalaceCRY | → | Manchester UnitedMAN | Undisclosed |
| 12 Jun 19 | D. James Daniel James |  Swansea CitySWA | → | Manchester UnitedMAN | Undisclosed |
| 12 Jun 19 | D. James Daniel James | Swansea CitySWA | → | Manchester UnitedMAN | Undisclosed |
| 31 Jan 19 | M. Willock Matthew Willock | Manchester UnitedMAN | → |  Crawley TownCRA | Loan |
| 30 Jan 19 | Ro-Shaun Williams | Manchester UnitedMAN | → |  Shrewsbury TownSHR | Undisclosed |
| 18 Jan 19 | R. Poole Regan Poole | Manchester UnitedMAN | → |  Newport CountyNEW | Loan |
| 11 Jan 19 | E. Hamilton Ethan Hamilton | Manchester UnitedMAN | → |  RochdaleROCH | Loan |