| 31 Aug 18 | Y. Karamoh Yann Karamoh |  InternazionaleINT | → |  BordeauxBOR | Loan |
| 31 Aug 18 | Y. Karamoh Yann Karamoh | InternazionaleINT | → | BordeauxBOR | Loan |
| 19 Aug 18 | J. Murillo Jeison Murillo | InternazionaleINT | → |  ValenciaVAL | Loan |
| 19 Aug 18 | J. Murillo Jeison Murillo | InternazionaleINT | → | ValenciaVAL | Loan |
| 17 Aug 18 | Andrea Pinamonti | InternazionaleINT | → |  FrosinoneFRO | Loan |
| 17 Aug 18 | Mattia Tordini | InternazionaleINT | → |  TorinoTOR | Loan |
| 17 Aug 18 | Riccardo Lunghi | InternazionaleINT | → |  BolognaBOL | Loan |
| 13 Aug 18 | K. Baldé Keita Baldé |  AS MonacoMON | → | InternazionaleINT | Loan |
| 13 Aug 18 | K. Baldé Keita Baldé | AS MonacoMON | → | InternazionaleINT | Loan |
| 07 Aug 18 | F. Dimarco Federico Dimarco |  ParmaPAR | → | InternazionaleINT | Loan |
| 07 Aug 18 | J. Biabiany Jonathan Biabiany | InternazionaleINT | → | ParmaPAR | Undisclosed |
| 07 Aug 18 | A. Bastoni Alessandro Bastoni | InternazionaleINT | → | ParmaPAR | Loan |
| 31 Jul 18 | S. Vrsaljko Sime Vrsaljko |  Atletico MadridATL | → | InternazionaleINT | Loan |
| 31 Jul 18 | S. Vrsaljko Sime Vrsaljko | Atletico MadridATL | → | InternazionaleINT | Loan |
| 13 Jul 18 | Éder | InternazionaleINT | → |  Jiangsu SuningSUN | Undisclosed |
| 05 Jul 18 | S. Long Sam Long | InternazionaleINT | → |  HuescaHUE | Loan |
| 05 Jul 18 | L. Martínez Lautaro Martínez |  Racing ClubRAC | → | InternazionaleINT | Undisclosed |
| 05 Jul 18 | L. Martínez Lautaro Martínez | Racing ClubRAC | → | InternazionaleINT | Undisclosed |
| 04 Jul 18 | L. Martínez Lautaro Martínez | Racing ClubRAC | → | InternazionaleINT | Undisclosed |
| 04 Jul 18 | L. Martínez Lautaro Martínez | Racing ClubRAC | → | InternazionaleINT | Undisclosed |
| 01 Jul 18 | S. de Vrij Stefan de Vrij |  LazioLAZ | → | InternazionaleINT | Free |
| 01 Jul 18 | G. Kondogbia Geoffrey Kondogbia | InternazionaleINT | → | ValenciaVAL | Undisclosed |
| 01 Jul 18 | G. Kondogbia Geoffrey Kondogbia | InternazionaleINT | → | ValenciaVAL | Undisclosed |
| 01 Jul 18 | K. Asamoah Kwadwo Asamoah |  JuventusJUV | → | InternazionaleINT | Free |
| 01 Jul 18 | R. Manaj Rey Manaj | InternazionaleINT | → |  AlbaceteALB | Loan |
| 01 Jul 18 | M. Politano Matteo Politano |  SassuoloSAS | → | InternazionaleINT | Loan |
| 01 Jul 18 | I. Radu Ionut Radu | InternazionaleINT | → |  GenoaGEN | Loan |
| 30 Jun 18 | M. Carraro Marco Carraro | InternazionaleINT | → |  AtalantaATA | Undisclosed |
| 30 Jun 18 | J. Odgaard Jens Odgaard | InternazionaleINT | → | SassuoloSAS | Undisclosed |
| 30 Jun 18 | Y. Nagatomo Yuto Nagatomo | InternazionaleINT | → |  GalatasarayGAL | Undisclosed |
| 29 Jun 18 | Davide Bettella | InternazionaleINT | → | AtalantaATA | Undisclosed |
| 29 Jun 18 | N. Zaniolo Nicolò Zaniolo | InternazionaleINT | → |  AS RomaROMA | Undisclosed |
| 29 Jun 18 | Federico Valietti | InternazionaleINT | → | GenoaGEN | Undisclosed |
| 26 Jun 18 | D. Santon Davide Santon | InternazionaleINT | → | AS RomaROMA | Undisclosed |
| 26 Jun 18 | R. Nainggolan Radja Nainggolan | AS RomaROMA | → | InternazionaleINT | Undisclosed |
| 08 Jun 18 | G. Kondogbia Geoffrey Kondogbia | InternazionaleINT | → | ValenciaVAL | Undisclosed |
| 08 Jun 18 | G. Kondogbia Geoffrey Kondogbia | InternazionaleINT | → | ValenciaVAL | Undisclosed |
| 31 Jan 18 | Y. Nagatomo Yuto Nagatomo | InternazionaleINT | → | GalatasarayGAL | Loan |
| 30 Jan 18 | Z. Vanheusden Zinho Vanheusden | InternazionaleINT | → |  Standard LiegeSTL | Loan |
| 26 Jan 18 | João Mário | InternazionaleINT | → |  West Ham UnitedWHU | Loan |
| 26 Jan 18 | João Mário | InternazionaleINT | → | West Ham UnitedWHU | Loan |
| 25 Jan 18 | G. Barbosa Gabriel Barbosa | InternazionaleINT | → |  SantosSAN | Loan |
| 25 Jan 18 | G. Barbosa Gabriel Barbosa | InternazionaleINT | → | SantosSAN | Loan |
| 22 Jan 18 | Rafinha |  BarcelonaBAR | → | InternazionaleINT | Loan |
| 22 Jan 18 | Rafinha | BarcelonaBAR | → | InternazionaleINT | Loan |
| 16 Jan 18 | L. López Lisandro López |  BenficaBEN | → | InternazionaleINT | Loan |