| City/Airport Name | Country | Airport Code | |
| IASI | Romania | LRIA | |
| IBADAN NEW IBADAN | Nigeria | DNIB | |
| IBAGUE PERALES | Colombia | SKIB | |
| IBIZA | Spain | LEIB | |
| IGLOOLIK | Canada | CYGT | CANADA (NW TERRITORIES) |
| IGUASSU FALLS CATARATAS | Brazil | SBSI | BRAZIL (PR) |
| IGUAZU FALLS | Argentina | SARI | ARGENTINA (MS) |
| IHOSY | Madagascar | FMSI | |
| IKI | Japan | RJDB | |
| ILAKA EAST | Madagascar | FMMQ | |
| ILE DES PINS MOUE | New Caledonia | NWEE | NEW CALEDONIA (F) |
| ILES DE LA MADELEINE | Canada | CYGR | CANADA (QUEBEC) |
| ILHEUS | Brazil | SBIL | BRAZIL (BA) |
| ILIAMNA | USA | PAIL | USA (ALASKA) |
| ILLIZI ILLIRANE | Algeria | DAAP | |
| ILOILO ILOILO | Philippines | RPVI | |
| ILORIN | Nigeria | DNIL | |
| IMPERATRIZ | Brazil | SBIZ | BRAZIL (MA) |
| IMPERIAL COUNTY | USA | KIPL | USA (CALIFORNIA) |
| IMPFONDO | Congo, Democratic Republic of | FCOI | CONGO |
| IMPHAL | India | VEIM | |
| IN GUEZZAM | Algeria | DATG | |
| IN SALAH | Algeria | DAUI | |
| INANWATAN | Indonesia | WASI | |
| INDIANAPOLIS INTERNATIONAL | USA | KIND | USA (INDIANA) |
| INDORE | India | VAID | |
| INHAMBANE | Mozambique | FQIN | |
| INISHEER | Republic of Ireland | EIIR | IRELAND |
| INISHMAAN | Republic of Ireland | EIMN | IRELAND |
| INISHMORE | Republic of Ireland | EIIM | IRELAND |
| INNSBRUCK KRANEBITTEN | Austria | LOWI | |
| INONGO | | FZBA | ZAIRE |
| INTERNATIONAL FALLS | USA | KINL | USA (MINNESOTA) |
| INUKJUAK | Canada | CYPH | CANADA (QUEBEC) |
| INUVIK | Canada | CYEV | CANADA (NW TERRITORIES) |
| INVERCARGILL | New Zealand | NZNV | |
| INVERNESS DALCROSS | United Kingdom | EGPE | |
| IOANNINA | Greece | LGIO | |
| IPATINGA USIMINAS | Brazil | SBIP | BRAZIL (MG) |
| IPIALES SAN LUIS | Colombia | SKIP | |
| IPOH SULTAN AZLAN SHAW | Malaysia | WMKI | |
| IPOTA | Vanuatu | NVVI | |
| IQUIQUE DIEGO ARACENA | Chile | SCDA | |
| IQUITOS FRANCISCO SECADA | Peru | SPQT | |
| IRINGA | Tanzania | HTIR | |
| IRKUTSK | Russia | UIII | |
| ISAFJORDUR | Iceland | BIIS | |
| ISHIGAKI | Japan | ROIG | |
| ISIRO MATARI | | FZJH | ZAIRE |
| ISLAND LAKE GARDEN HILL | Canada | CYIV | CANADA (MANITOBA) |
| ISLAY | United Kingdom | EGPI | |
| ISLE OF MAN RONALDSWAY | United Kingdom | EGNS | |
| ISLIP MC ARTHUR/LONG ISLD. | USA | KISP | USA (NEW YORK) |
| ISTANBUL ATATUERK INTERNATIONAL | Turkey | LTBA | |
| IVALO | Finland | EFIV | |
| IVANO-FRANKOVSK | Ukraine | | |
| IZMIR ADNAN MENDERES | Turkey | LTBJ | |
| IZUMO | Japan | RJOC | |
