| 01 Sept 17 | A. Pereira Andrea Pereira |  Manchester UnitedMAN | → |  ValenciaVAL | Loan |
| 01 Sept 17 | A. Pereira Andrea Pereira | Manchester UnitedMAN | → | ValenciaVAL | Loan |
| 31 Aug 17 | M. Willock Matthew Willock | Manchester UnitedMAN | → |  FC UtrechtUTR | Loan |
| 31 Aug 17 | M. Willock Matthew Willock | Manchester UnitedMAN | → | FC UtrechtUTR | Loan |
| 24 Aug 17 | Z. Ibrahimovic Zlatan Ibrahimovic | XXX | → | Manchester UnitedMAN | Free |
| 12 Aug 17 | G. Varela Gullermo Varela | Manchester UnitedMAN | → |  PeñarolPEN | Undisclosed |
| 10 Aug 17 | T. Fosu-Mensah Timothy Fosu-Mensah | Manchester UnitedMAN | → |  Crystal PalaceCRY | Loan |
| 07 Aug 17 | C. Borthwick-Jackson Cameron Borthwick-Jackson | Manchester UnitedMAN | → |  Leeds UnitedLEE | Loan |
| 07 Aug 17 | C. Borthwick-Jackson Cameron Borthwick-Jackson | Manchester UnitedMAN | → | Leeds UnitedLEE | Loan |
| 31 Jul 17 | N. Matic Nemanja Matic |  ChelseaCHE | → | Manchester UnitedMAN | Undisclosed |
| 28 Jul 17 | D. Redmond Devonte Redmond | Manchester UnitedMAN | → |  Scunthorpe UnitedSCU | Loan |
| 14 Jul 17 | S. Johnstone Sam Johnstone | Manchester UnitedMAN | → |  Aston VillaAVL | Loan |
| 14 Jul 17 | S. Johnstone Sam Johnstone | Manchester UnitedMAN | → | Aston VillaAVL | Loan |
| 12 Jul 17 | A. Januzaj Adnan Januzaj | Manchester UnitedMAN | → |  Real SociedadRSO | Undisclosed |
| 12 Jul 17 | A. Januzaj Adnan Januzaj | Manchester UnitedMAN | → | Real SociedadRSO | Undisclosed |
| 10 Jul 17 | R. Lukaku Romelu Lukaku |  EvertonEVE | → | Manchester UnitedMAN | Undisclosed |
| 10 Jul 17 | D. Henderson Dean Henderson | Manchester UnitedMAN | → |  Shrewsbury TownSHR | Loan |
| 09 Jul 17 | W. Rooney Wayne Rooney | Manchester UnitedMAN | → | EvertonEVE | Undisclosed |
| 07 Jul 17 | R. Poole Regan Poole | Manchester UnitedMAN | → |  Northampton TownNHT | Loan |
| 03 Jul 17 | J. Harrop Josh Harrop | Manchester UnitedMAN | → |  Preston North EndPNE | Undisclosed |
| 03 Jul 17 | J. Harrop Josh Harrop | Manchester UnitedMAN | → | Preston North EndPNE | Undisclosed |
| 01 Jul 17 | J. Harrop Josh Harrop | Manchester UnitedMAN | → | Preston North EndPNE | Free |
| 01 Jul 17 | J. Harrop Josh Harrop | Manchester UnitedMAN | → | Preston North EndPNE | Free |
| 01 Jul 17 | V. Lindelöf Victor Lindelöf |  BenficaBEN | → | Manchester UnitedMAN | Undisclosed |
| 29 Mar 17 | B. Schweinsteiger Bastian Schweinsteiger | Manchester UnitedMAN | → |  Chicago Fire FCCHI | Free |
| 29 Mar 17 | B. Schweinsteiger Bastian Schweinsteiger | Manchester UnitedMAN | → | Chicago Fire FCCHI | Free |
| 28 Jan 17 | S. Goss Sean Goss | Manchester UnitedMAN | → |  Queens Park RangersQPR | Undisclosed |
| 28 Jan 17 | S. Goss Sean Goss | Manchester UnitedMAN | → | Queens Park RangersQPR | Undisclosed |
| 20 Jan 17 | M. Depay Memphis Depay | Manchester UnitedMAN | → |  LyonLYON | 16,000,000 |
| 20 Jan 17 | M. Depay Memphis Depay | Manchester UnitedMAN | → | LyonLYON | 16,000,000 |
| 17 Jan 17 | Joe Riley | Manchester UnitedMAN | → |  Sheffield UnitedSHU | Loan |
| 12 Jan 17 | M. Schneiderlin Morgan Schneiderlin | Manchester UnitedMAN | → | EvertonEVE | 24000000 |
| 05 Jan 17 | S. Johnstone Sam Johnstone | Manchester UnitedMAN | → | Aston VillaAVL | Loan |
| 05 Jan 17 | S. Johnstone Sam Johnstone | Manchester UnitedMAN | → | Aston VillaAVL | Loan |