| Airline Name | IATA | ICAO | AWB Prefix |
Country |
| IAT Cargo Airlines | VGO | United Kingdom | ||
| IBC Airways Inc | II | CSQ | 175 | United States |
| Iberia | IB | IBE | 075 | Spain |
| Iberworld | IWD | Spain | ||
| Ibex Airlines | FW | IBX | Japan | |
| ICAR Aviation | MEM | France | ||
| Icaro | X8 | 545 | Ecuador | |
| Iceland Express | 5W | Iceland | ||
| Icelandair Cargo | FI | ICE | 108 | Iceland |
| IFL Group | TSU | United States | ||
| Ikaros Fly | IKR | Denmark | ||
| Ilavia Airlines | ILV | Russia | ||
| ILPO Aruba Cargo | IO | ILP | Caribbean Area, Aruba | |
| Imair Airline | IK | ITX | Azerbaijan | |
| Impala Air | IPL | South Africa | ||
| Imperial Air Cargo | South Africa | |||
| Imperial Airlines | REJ | United Kingdom | ||
| Imperial Cargo Airlines | RCN | 765 | Nigeria | |
| Impulse Aero | IMR | Russia | ||
| Impulse Airlines | VQ | OAA | 253 | Australia |
| Imtrec Aviation | IMT | Cambodia | ||
| Independent Air Freighters | Australia | |||
| Indian Airlines | IC | IAC | 058 | India |
| Indian Ocean Airways | Mauritius | |||
| IndiGo Airlines | 6E | IGO | India | |
| Indonesia Air Transport | I8 | IDA | Indonesia | |
| Indonesia AirAsia | QZ | AWQ | Indonesia | |
| Informtrans-Avia | INS | Ukraine | ||
| Insel Air | 7I | INC | 958 | Caribbean Area, Curaçao |
| Intal Avia | INL | Kyrgyzstan | ||
| Inter Airlines | 6K | INX | Turkey | |
| Inter Island Express | Caribbean Area, Puerto Rico | |||
| Inter Trans Air | ITT | Bulgaria | ||
| Inter-Canadian (Canadian Partner) | ICN | Canada | ||
| Interair South Africa | D6 | ILN | 625 | South Africa |
| Interbrasil Star | Q9 | ITB | Brazil | |
| Intercontinental de Aviacion | RS | ICT | Colombia | |
| Interflight | IFT | United Kingdom | ||
| Interisland Airlines | ISN | Philippines | ||
| Interjet | 4O | AIJ | Mexico | |
| Interot Airways | IQ | IRT | 614 | Germany |
| Intersky | 3L | ISK | Austria | |
| Interstate Airlines | I4 | FWA | Netherlands | |
| Inversija | INV | Latvia | ||
| Ion Tiriac Air | TIH | Romania | ||
| Iran Air | IR | IRA | 096 | Iran |
| Iran Aseman Airlines | EP | IRC | 815 | Iran |
| Iraqi Airways | IA | IAW | 073 | Iraq |
| Iron Dragon Fly | IDF | Russia | ||
| IRS Airlines | LVB | Nigeria | ||
| Irtysh Air | IH | MZA | Kazakhstan | |
| Island Air | WP | MKU | United States | |
| Island Aviation Services | Q2 | DQA | Maldives | |
| Islandsflug | HH | ICB | 652 | Iceland |
| Islas Airways | IF | ISW | Canary Islands | |
| Islena Airlines | WC | ISV | 282 | Honduras |
| Isles of Scilly Skybus | 5Y | IOS | United Kingdom | |
| Israir | 6H | ISR | 818 | Israel |
| Istanbul Airlines | IL | IST | Turkey | |
| Itali Airlines | 9X | ACL | Italy | |
| Itapemirim Transportes Aereos | K9 | ITM | 660 | Brazil |
| Itek Air | GI | IKA | 420 | Kyrgyzstan |
| Ivan Air | IVN | Croatia | ||
| Ivoire Airways | IVW | Ivory Coast | ||
| Izhavia | IZA | Russia |
