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Indigo Airlines
| 15 Compagnies | Compagnie (100) | Nb | Co | Nation | Notes |
| IBC Airways | IBC Airways | 12 | 0 | USA | Accident |
| Iberia | Iberia | 77 | 18 | Espagne | |
| Iberia Express | Iberia Express | 24 | 1 | Espagne | |
| Icelandair | Icelandair | 1 | 0 | Islande | Disparue |
| Imair Airlines | Imair Airlines | 2 | 0 | Azerbaïdjan | Fermé |
| Independence Air | Independence Air | 95 | 0 | USA | Fermé |
| Independent Air | Independent Air | 5 | 0 | USA (Accident) | Fermé |
| Indian Airlines | Indian Airlines | 57 | 0 | Inde | Fusion |
| Indigo Airlines | Indigo Airlines | 360 | 959 | Inde | |
| Indonesia AirAsia | Indonesia AirAsia | 30 | 70 | Indonésie | |
| Int'Air Îles | Int'Air Îles | 6 | 0 | Comores | |
| Inter-Canadien | Inter-Canadien | 35 | 0 | Canada | Faillite |
| Intercontinental de Aviación | Intercontinental de Aviación | 8 | 0 | Colombie (Accidents) | Fermé |
| Interair | Interair | 4 | 0 | Afrique Sud | |
| Interflug | Interflug | 40 | 0 | RDA | Fermé |
| 18 Compagnies | Compagnie (100) | Nb | Co | Nation | Note |
| Interjet | Interjet | 25 | 0 | Mexique | |
| Interlink Airlines | Interlink Airlines | 4 | 0 | Afrique du Sud | Fermé |
| International Business Air | International Business Air | 2 | 0 | Suède | Rebaptisé |
| InterSky | InterSky | 1 | 0 | Autriche | Stand By |
| Interstate Airlines | Interstate Airlines | 16 | 0 | Pays-Bas | Fermé |
| Ipec Air (Cargo) | Ipec Air | 5 | 0 | Australie | Fermé |
| Iraqi Airways | Iraqi Airways | 33 | 13 | Irak | Interdit UE |
| Iran Air | Iran Air (Accidents) | 30 | 0 | Iran | Interdit US |
| Iran Airtour | Iran Airtour (Accidents) | 17 | 0 | Iran | |
| Iran Aseman Air. | Iran Aseman Air. | 22 | 0 | Iran (Interdit US) | Interdit UE |
| Island Air | Island Air | 5 | 0 | USA (Hawaï) | Faillite |
| Island Express Air | Island Express Air | 5 | 0 | Canada (Covid) | Fermé |
| Islas Airways | Islas Airways | 6 | 0 | Espagne | Fermé |
| Israir Airlines | Israir Airlines | 9 | 0 | Israël | |
| ITA Airways | ITA Airways | 102 | 20 | Italie | |
| Itapemirim Trans. Aér. | Itapemirim Trans. Aér. | 7 | 0 | Brésil (Faillite) | Révoqué |
| Itek Air (Interdit UE) | Itek Air (Accident) | 2 | 0 | Kirghizistan | Fermé |
| Invicta Internat. Air. | Invicta Internat. Air. | 30 | 0 | UK | Fermé |
| Izhavia | Izhavia | 11 | 0 | Russie | Interdit UE |