| IAD | KIAD | Washington - Dulles International Airport, United States |
| IAG | KIAG | Niagara Falls International Airport, United States |
| IAH | KIAH | Houston - Bush Intercontinental Airport, United States |
| IBZ | LEIB | Ibiza Airport, Spain |
| ICN | RKSI | Seoul - Incheon International Airport, South Korea |
| ICT | KICT | Wichita Mid-Continent Airport, United States |
| IDY | LFEY | Ile d´Yeu Airport - Grand Phare, France |
| IEV | UKKK | Kiev - Zulhany Airport, Ukraine |
| IFO | UKLI | Ivano Frankivsk International Airport, Ukraine |
| IGR | SARI | Iguazu International Airport, Argentina |
| IGU | SBFI | Foz do Iguaçu - Cataratas Int´l Airport, Brazil |
| IKT | UIII | Irkutsk Airport, Russia |
| ILM | KILM | Wilmington Int´l Airport, United States |
| ILY | EGPI | Islay Airport, United Kingdom |
| INC | ZLIC | Yinchuan Hedong Airport, China PRC |
| IND | KIND | Indianapolis - Grissom Aeroplex, United States |
| IND | KIND | Indianapolis International Airport, United States |
| INN | LOWI | Innsbruck Airport, Austria |
| INT | KINT | Winston-Salem - Smith Reynolds Airport, United States |
| INU | ANAU | Nauru International Airport, Pac.Is, Nauru |
| INV | EGPE | Inverness-Dalcross Airport, United Kingdom |
| IOA | LGIO | Ioannina National Airport, Greece |
| IOM | EGNS | Isle of Man Airport, United Kingdom |
| IPH | WMKI | Ipoh - Sultan Azlan Shah Airport, Malaysia |
| IPT | KIPT | Williamsport Regional Airport, United States |
| IQQ | SCDA | Iquique Airport - Diego Aracena, Chile |
| IQT | SPQT | Iquitos Airport, Peru |
| IRJ | SANL | La Rioja Airport, Argentina |
| ISA | YBMA | Mount Isa Airport, Australia |
| ISB | OPRN | Islamabad International Airport, Pakistan |
| ISC | EGHE | Isles of Scilly-St Mary´s Airport, United Kingdom |
| ISO | KISO | Kinston - North Carolina Global Transpark, United States |
| ISP | KISP | Long Island - MacArthur Airport, United States |
| IST | LTBA | Istanbul - Atatürk Airport, Turkey |
| ITH | KITH | Ithaca - Tompkins County Airport, United States |
| ITM | RJOO | Osaka - Itami International Airport, Japan |
| ITO | PHTO | Hilo International Airport, United States |
| IVL | EFIV | Ivalo Int´l Airport, Finland |
| IYK | KIYK | Inyokern - Kern County Airport, United States |
