| Agartala - Maharaja Bir Bikram Airport | IXA | Agartala | IN |
| Alemson Airstrip | — | Alemson | ID |
| Andrés Miguel Salazar Marcano Airport | ICC | Isla de Coche | VE |
| Aurangabad Airport | IXU | Aurangabad | IN |
| Awimbon Airstrip | — | Awimbon | ID |
| Bagdogra Airport | IXB | Siliguri | IN |
| Bahia - Jorge Amado Airport | IOS | Ilhéus | BR |
| Baljek Airport | — | — | IN |
| Baramati Airport | — | Pune | IN |
| Belagavi Airport | IXG | Belgaum | IN |
| Binban Airstrip | — | Binban | ID |
| Bir Tikendrajit International Airport | IMF | Imphal | IN |
| Birsa Munda Airport | IXR | Ranchi | IN |
| Bob Baker Memorial Airport | IAN | Kiana | US |
| Bordamban Airport | — | Bordamban | ID |
| Capitan V A Almonacid Airport | IRJ | La Rioja | AR |
| Cataratas Del Iguazú International Airport | IGR | Puerto Iguazu | AR |
| Cataratas International Airport | IGU | Foz do Iguaçu | BR |
| Cicia Airport | ICI | Cicia | FJ |
| Circle City (New) Airport | IRC | Circle | US |
| Coronel FAP Francisco Secada Vignetta International Airport | IQT | Iquitos | PE |
| Devi Ahilya Bai Holkar International Airport | IDR | Indore | IN |
| Diego Aracena International Airport | IQQ | Iquique | CL |
| Diphikin Airstrip | — | Binsari | ID |
| Dumpasik Airstrip | — | Dumpasik | ID |
| Falls International Airport | INL | International Falls | US |
| Ford Airport | IMT | Kingsford | US |
| General Antonio Cárdenas Rodríguez National Airport / Ixtepec Air Base | IZT | Ixtepec | MX |
| General Jorge Fernandez Maldon Airport | ILQ | Ilo | PE |
| General Tunde Idiagbon International Airport | ILR | Ilorin/Ogbomosho | NG |
| General Villamil Airport | IBB | Puerto Villamil | EC |
| George Bush Intercontinental Airport | IAH | Houston | US |
| Gogebic Iron County Airport | IWD | Ironwood | US |
| Golden Ring Yaroslavl International Airport | IAR | Tunoshna | RU |
| Hangmata Airstrip | — | Hangmata | ID |
| Hilo International Airport | ITO | Hilo | US |
| Iaşi International Airport | IAS | Iaşi | RO |
| Ibadan Airport | IBA | Ibadan | NG |
| Ibaraki Airport | IBR | Omitama | JP |
| Ibiza Airport | IBZ | Ibiza (Eivissa) | ES |
| Idaho Falls Regional Airport | IDA | Idaho Falls | US |
| Igarka Airport | IAA | Igarka | RU |
| Iğdır Airport | IGD | Iğdır | TR |
| Igiugig Airport | IGG | Igiugig | US |
| Iki Airport | IKI | Iki | JP |
| Île des Pins Airport | ILP | Île des Pins | NC |
| Ilford Airport | ILF | Ilford | CA |
| Iliamna Airport | ILI | Iliamna | US |
| Iloilo International Airport | ILO | Cabatuan | PH |
| Ilopango International Airport | ILS | San Salvador | SV |
| Imam Khomeini International Airport | IKA | Tehran | IR |
| Imperial County Airport | IPL | Imperial | US |
| In Salah Airport | INZ | In Salah | DZ |
| Inagua Airport | IGA | Matthew Town | BS |
| Incheon International Airport | ICN | Seoul | KR |
| Independence Airport | INB | Independence | BZ |
| Indianapolis International Airport | IND | Indianapolis | US |
| Inhambane Airport | INH | Inhambane | MZ |
| Inisheer Aerodrome | INQ | Inis Oírr | IE |
| Inishmaan Aerodrome | IIA | Inis Meáin | IE |
| Inishmore Aerodrome | IOR | Inis Mór | IE |
| Innsbruck Airport | INN | Innsbruck | AT |
| Inongo Airport | INO | Inongo | CD |
| Invercargill Airport | IVC | Invercargill | NZ |
| Inverness Airport | INV | Inverness | GB |
| Ioannina King Pyrrhus National Airport | IOA | Ioannina | GR |
| Irkutsk International Airport | IKT | Irkutsk | RU |
| Ísafjörður Airport | IFJ | Ísafjörður | IS |
| Isfahan Shahid Beheshti International Airport | IFN | Isfahan | IR |
| Islamabad International Airport | ISB | Attock | PK |
| Islay Airport | ILY | Isle of Islay, Argyll and Bute | GB |
| Isle of Man Airport | IOM | Castletown | IM |
| Issyk-Kul International Airport | IKU | Tamchy | KG |
| İstanbul Airport | IST | Istanbul | TR |
| Itaituba Airport | ITB | Itaituba | BR |
| Ithaca Tompkins Regional Airport | ITH | Ithaca | US |
| Iturup Airport | ITU | Kurilsk | RU |
| Ivalo Airport | IVL | Ivalo | FI |
| Ivano-Frankivsk International Airport | IFO | Ivano-Frankivsk | UA |
| Ivanovo South Airport | IWA | Ivanovo | RU |
| Iwakuni Kintaikyo Airport | IWK | Iwakuni | JP |
| Iwami Airport | IWJ | Masuda | JP |
| Iwur Airstrip | — | Iwur | ID |
| Izhevsk Airport | IJK | Izhevsk | RU |
| Izumo Enmusubi Airport | IZO | Izumo | JP |
| Jalal Talabani International Airport | ISU | Sulaymaniyah | IQ |
| Jammu Airport | IXJ | Jammu | IN |
| Kaklup Airstrip | — | Kaklup | ID |
| Kandla Airport | IXY | Kandla | IN |
| Karakol International Airport | IKG | Karakol | KG |
| Keshod Airport | IXK | Keshod | IN |
| Kirimu Airstrip | — | Pegunungan Bintang Regency | ID |
| Kirksville Regional Airport | IRK | Kirksville | US |
| Kiwi Airstrip | — | Kiwi | ID |
| Kotyobakon Airstrip | — | Pegunungan Bintang Regency | ID |
| Kubibkop Airport | — | Kubibkop | ID |
| Lasondre Airport | — | Pulau-Pulau Batu | ID |
| Leh Kushok Bakula Rimpochee Airport | IXL | Leh | IN |
| Lilabari North Lakhimpur Airport | IXI | Lilabari | IN |
| Lleida-Alguaire Airport | ILD | Lleida | ES |
| Lockhart River Airport | IRG | Lockhart River | AU |
| Long Island MacArthur Airport | ISP | Islip | US |
| Long Rungan Airport | — | Long Rungan | ID |
| Madurai Airport | IXM | Madurai | IN |
| Magas Airport | IGT | Sunzha | RU |
| Maksum Airstrip | — | Pegunungan Bintang Regency | ID |
| Mangaluru International Airport | IXE | Mangaluru | IN |
| Matari Airport | IRP | Isiro | CD |
| Mataveri International Airport | IPC | Isla De Pascua | CL |
| Mipol Airstrip | — | Pegunungan Bintang Regency | ID |
| Molding Airstrip | — | Pegunungan Bintang | ID |
| Mount Isa Airport | ISA | Mount Isa | AU |
| Nashik International Airport | ISK | Nashik | IN |
| Nauru International Airport | INU | Yaren | NR |
| New Ishigaki Airport | ISG | Ishigaki | JP |
| Ngorangora Airport | IRA | Kirakira | SB |
| Niagara Falls International Airport | IAG | Niagara Falls | US |
| Nikolski Air Station | IKO | Nikolski | US |
| Niš Constantine the Great Airport | INI | Niš | RS |
| Niue International Airport | IUE | Alofi | NU |
| Okbab Airstrip | — | Okbab | ID |
| Oklip Airstrip | — | Oklip | ID |
| Okpahik Airstrip | — | Okpahik | ID |
| Okyap Airstrip | — | Okyap | ID |
| Old Nabire Airport | — | Nabire | ID |
| Osaka Itami International Airport | ITM | Osaka | JP |
| Pathankot Airport | IXP | Pathankot | IN |
| Pedam Airstrip | — | Pegunungan Bintang Regency | ID |
| Perales Airport | IBE | Ibagué | CO |
| Prayagraj Airport | IXD | Allahabad | IN |
| Prefeito Renato Moreira Airport | IMP | Imperatriz | BR |
| Presidente Itamar Franco Airport | IZA | Juiz de Fora | BR |
| Qiemo Yudu Airport | IQM | Qiemo | CN |
| Qingyang Xifeng Airport | IQN | Qingyang (Xifeng) | CN |
| San Luis Airport | IPI | Ipiales | CO |
| Sape Airstrip | — | Sape | ID |
| Shaheed Bhagat Singh International Airport | IXC | Chandigarh | IN |
| Siargao Airport | IAO | Del Carmen | PH |
| Silchar Airport | IXS | Silchar | IN |
| Simikot Airport | IMK | Simikot | NP |
| St. Mary's Airport | ISC | St. Mary's, Isles of Scilly | GB |
| Süleyman Demirel International Airport | ISE | Isparta | TR |
| Sultan Azlan Shah Airport | IPH | Ipoh | MY |
| Suntamon Airport | — | Suntamon | ID |
| Tabing Airport | — | Padang | ID |
| Tapuruquara Airport | IRZ | Santa Isabel do Rio Negro | BR |
| Tarup Airstrip | — | Tarup | ID |
| Tiksi Airport | IKS | Tiksi | RU |
| Tinibil Airstrip | — | Pegunungan Bintang | ID |
| Usiminas Airport | IPN | Ipatinga | BR |
| Veer Savarkar International Airport / INS Utkrosh | IXZ | Port Blair | IN |
| Washington Dulles International Airport | IAD | Dulles | US |
| Wichita Dwight D. Eisenhower National Airport | ICT | Wichita | US |
| Williamsport Regional Airport | IPT | Williamsport | US |
| Wilmington Airport | ILG | Wilmington | US |
| Wilmington International Airport | ILM | Wilmington | US |
| Yapil Airstrip | — | Yapil | ID |
| Yinchuan Hedong International Airport | INC | Yinchuan | CN |
| Zarzaitine - In Aménas Airport | IAM | In Aménas | DZ |
| Zielona Góra-Babimost Airport | IEG | Nowe Kramsko | PL |