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IATA 3-letter airport codes: I
IAA	Igarka, Krasnoyarsk, Russia
IAB	Wichita, KS [Mc Connell Air Force Base], USA
IAD	Washington, DC [Washington Dulles International Airport], USA
IAG	Niagara Falls, NY [Niagara Falls International Airport], USA
IAH	Houston, TX [Houston Intercontinental Airport], USA
IAL	Ialibu, Papua New Guinea
IAM	Zerzaltine [In Amenas], Algeria
IAN	Kiana, AK [Bob Baker Memorial Airport], USA
IAQ	Bahregan, Iran
IAS	Iasi, Romania
IBA	Ibadan, Nigeria
IBE	Ibague, Colombia
IBI	Iboki, Papua New Guinea
IBM	Kimball, NE [Kimball Municipal Airport/Robert E. Arraj Field], USA
IBO	Ibo, Mozambique
IBP	Iberia, Peru
IBZ	Ibiza, Balearic Islands, Spain
ICA	Icabaru, Venezuela
ICI	Cicia, Fiji
ICK	Nieuw Nickerie (New Nickerie), Suriname
ICL	Clarinda, IA [Schenck Field], USA
ICR	Nicaro, Cuba
ICT	Wichita, KS [Wichita Mid-Continent Airport], USA
ICY	Icy Bay, AK [Icy Bay Airport], USA
IDA	Idaho Falls, ID [Fanning Field], USA
IDB	Idre, Sweden
IDF	Idiofa, Zaire
IDG	Ida Grove, IA [Ida Grove Municipal Airport], USA
IDI	Indiana, PA [Indiana County (Jimmy Stewart Field)], USA
IDK	Indulkana, South Australia, Australia
IDL	Indianola, MS [Indianola Municipal Airport], USA
IDN	Indagen, Papua New Guinea
IDO	Santa Isabel, Brazil
IDP	Independence, KS [Independence Municipal Airport], USA
IDR	Indore, India
IDY	Ile d'Yeu, France
IEG	Zielona Gora, Poland
IEJ	Iejima, Japan
IEN	Now Shahr, Iran
IEV	Kyyiv (Kiev), Kiev [Zhulyany], Ukraine
IFA	Iowa Falls, IA [Iowa Falls Municipal Airport], USA
IFF	Iffley, Queensland, Australia
IFJ	Isafjordur, Iceland
IFL	Innisfail, Queensland, Australia
IFN	Isfahan, Iran
IFO	Ivano-Frankivs'k (Ivano Frankovsk), Ivano-Frankivs'k, Ukraine
IGA	Inagua (Matthew Town), Great Inagua, Bahamas
IGB	Ingeniero Jacobacci, Argentina
IGE	Iguela, Gabon
IGG	Igiugig, AK [Igiugig Airport], USA
IGH	Ingham, Queensland, Australia
IGL	Izmir [Cigli Air Base], Turkey
IGM	Kingman, AZ [Kingman Airport], USA
IGN	Iligan, Philippines
IGO	Chigorodo, Colombia
IGR	Iguazu [Cataratas del Iguazu], Argentina
IGU	Foz do Iguacu (Iguassu Falls), PR [Cataratas], Brazil
IHA	Niihame, Japan
IHN	Qishn, Yemen
IHO	Ihosy, Madagascar
IHU	Ihu, Papua New Guinea
IIA	Inishmaan, Ireland
IIB	Independence, IA [Independence Municipal Airport], USA
IIK	Kipnuk, AK [Kipnuk Airport], USA
IIN	Nishinoomote, Japan
IIS	Nissan Island, Papua New Guinea
IIY	Washington, GA [Washington-Wilkes County Airport], USA
IJD	Willimantic, CT [Windham Airport], USA
IJK	Izhevsk, Udmurtia, Russia
IJU	Ijui, RS, Brazil
IJX	Jacksonville, IL [Jacksonville Municipal Airport], USA
IKB	Wilkesboro, NC [Wilkes County Airport], USA
IKI	Iki, Japan
IKK	Kankakee, IL [Greater Kankakee Airport], USA
IKL	Ikela, Zaire
IKO	Nikolski, AK, USA
IKP	Inkerman, Queensland, Australia
IKS	Tiksi, Yakutia-Sakha [Bukhta Tiksi Ice Strip], Russia
IKT	Irkutsk, Irkutsk, Russia
IKV	Ankeny, IA [Ankeny Regional Airport], USA
ILA	Illaga, Indonesia
ILB	Ilha Solteira, MS, Brazil
ILE	Killeen, TX [Killeen Municipal Airport], USA
ILF	Ilford, MB [Ilford Airport], Canada
ILG	Wilmington, DE [New Castle County Airport], USA
ILH	Illishiem [Illishiem Army Air Field], Germany
ILI	Iliamna, AK [Iliamna Airport], USA
ILK	Ilaka, Madagascar
ILL	Willmar, MN [Willmar Municipal Airport-John L. Rice Field], USA
ILM	Wilmington, NC [New Hanover International Airport], USA
ILN	Wilmington, OH [Airborne Airpark], USA
ILO	Iloilo, Philippines
ILP	Ile des Pins (Isle of Pines), Isle of Pines, New Caledonia
ILR	Ilorin, Nigeria
ILU	Kilaguni, Tanzania
ILY	Islay [Port Ellen Airport], United Kingdom
ILZ	Zilina, Slovakia
IMA	Iamalele, Papua New Guinea
IMB	Imbaimadai, Guyana
IMD	Imonda, Papua New Guinea
IMF	Imphal, India
IMG	Inhaminga, Mozambique
IMI	Ine Island [Ine Airport], Marshall Islands
IMK	Simikot, Nepal
IML	Imperial, NE [Imperial Municipal Airport], USA
IMM	Immokalee, FL [Immokalee Airport], USA
IMO	Zemid, Central African Republic
IMP	Imperatriz, MA, Brazil
IMT	Iron Mountain/Kingsford, MI [Ford Airport], USA
IMZ	Nimroz, Afghanistan
INB	Independence, Belize
INC	Yinchuan, China
IND	Indianapolis, IN [Indianapolis International Airport], USA
INE	Chinde, Mozambique
INF	In Guezzam, Algeria
ING	Ago, Argentina
INH	Inhambane, Mozambique
INI	Nis, Yugoslavia
INJ	Injune, Queensland, Australia
INK	Wink, TX [Winkler County Airport], USA
INL	International Falls, MN [Falls International Airport], USA
INM	Innamincka, South Australia, Australia
INN	Innsbruck [Kranebitten], Austria
INO	Inongo, Zaire
INQ	Inisheer, Ireland
INR	Sault Ste. Marie, MI [Kinchelde Air Force Base], USA
INS	Indian Springs, NV [Indian Springs Air Force Auxiliary Airport], USA
INT	Winston-Salem, NC [Smith Reynolds Airport], USA
INU	Nauru [International], Nauru
INV	Inverness, Scotland, United Kingdom
INW	Winslow, AZ [Winslow Municipal Airport], USA
INX	Inanwatan, Indonesia
INZ	In Salah, Algeria
IOA	Ioannina, Greece
IOB	Mount Sterling, KY [Mount Sterling-Montgomery County Airport], USA
IOK	Iokea, Papua New Guinea
IOM	Isle of Man, Isle of Man [Ronaldsway Airport], United Kingdom
ION	Impfondo, Congo
IOP	Ioma, Papua New Guinea
IOR	Inishmore, Ireland
IOS	Ilheus, BA, Brazil
IOU	Ile Quen, New Caledonia
IOW	Iowa City, IA [Iowa City Municipal Airport], USA
IPA	Ipota, Vanuatu
IPC	Isla de Pascua, Easter Is. [Mataveri], Chile
IPE	Ipil, Philippines
IPG	Ipiranga, Brazil
IPH	Ipoh, Malaysia
IPI	Ipiales, Colombia
IPL	El Centro/Imperial, CA [Imperial County Airport], USA
IPN	Ipatinga, Brazil
IPT	Williamsport, PA [Williamsport-Lycoming County Airport], USA
IPU	Ipiau, BA, Brazil
IPW	Ipswich, United Kingdom
IQM	Qiemo, China
IQN	Qingyang, China
IQQ	Iquique [Diego Aracena], Chile
IQT	Iquitos [Coronel F.S. Vigneta], Peru
IRA	Kirakira, Solomon Islands
IRB	Iraan, TX [Iraan Municipal Airport], USA
IRC	Circle, AK [Circle City Airport], USA
IRD	Ishhurdi, Bangladesh
IRE	Irece, BA, Brazil
IRG	Lockhart Rivers, Queensland, Australia
IRI	Iringa, Tanzania
IRJ	La Rioja [Capitan Vicente Almando], Argentina
IRK	Kirksville, MO [Kirksville Regional Airport], USA
IRN	Iriona, Honduras
IRO	Biraro, Central African Republic
IRP	Isiro [Matari], Zaire
IRS	Sturgis, MI [Kirsch Municipal Airport], USA
ISA	Mount Isa, Queensland, Australia
ISB	Islamabad [Rawalp], Pakistan
ISC	Scilly Isles, England [St. Mary's Airport], United Kingdom
ISD	Iscuande, Colombia
ISG	Ishigaki, Japan
ISH	Ischia, Italy
ISI	Isisford, Queensland, Australia
ISJ	Isla Mujers, Mexico
ISK	Nasik, India
ISL	Isabel Pass, AK, USA
ISM	Kissimmee/Orlando, FL [Orlando Municipal Airport], USA
ISN	Williston, ND [Sloulin Field International], USA
ISO	Kinston, NC [Kinston Regional Jetport at Stallings Field], USA
ISP	Islip, NY [Long Island Mac Arthur Airport], USA
ISQ	Manistique, MI [Schoolcraft County Airport], USA
ISS	Wiscasset, ME [Wiscasset Airport], USA
IST	Istanbul [Ataturk/Yesilkov International Airport], Turkey
ISW	Wisconsin Rapids, WI [Alexander Field South Wood County], USA
ISZ	Cincinnati, OH [Cincinnati-Blue Ash Airport], USA
ITA	Itacoiatiara, AM, Brazil
ITB	Itaituba, PA, Brazil
ITE	Itubera, BA, Brazil
ITH	Ithaca, NY [Tompkins County Airport], USA
ITI	Itambacuri, MG, Brazil
ITJ	Itajai, SC, Brazil
ITK	Itokama, Papua New Guinea
ITM	Osaka [Itami Airport], Japan
ITN	Itabuna, BA, Brazil
ITO	Hilo, HI [Hilo International Airport], USA
ITQ	Itaqui, RS, Brazil
IUE	Niue Island, Niue Island
IUL	Ilu, New Guinea, Indonesia
IUM	Summit Lake, BC, Canada
IUS	Inus, Solomon Islands
IVA	Ambanja, Madagascar
IVC	Invercargill, New Zealand
IVG	Ivangrad, Yugoslavia
IVH	Ivishak, AK, USA
IVL	Ivalo, Finland
IVO	Chivolo, Colombia
IVR	Inverell, New South Wales, Australia
IVW	Inverway, Northern Territory, Australia
IWA	Iwakuni, Honshu Is. [Iwakuni Air Force Base], Japan
IWD	Ironwood, MI [Gogebic County Airport], USA
IWH	Wabash, IN [Wabash Municipal Airport], USA
IWJ	Iwami, Japan
IWO	Iwo Jima, Japan
IWS	Houston, TX [West Houston-Lakeside Airport], USA
IXA	Agartala, India
IXB	Bagdogra, India
IXC	Chandigarh, India
IXD	Allahabad, India
IXE	Mangalore, India
IXG	Belgaum, India
IXH	Kailashahar, India
IXI	Lilabari, India
IXJ	Jammu, India
IXK	Keshod, India
IXL	Leh, India
IXM	Madurai, India
IXN	Khowai, India
IXP	Pathankot, India
IXQ	Kamalpur, India
IXR	Ranchi, India
IXS	Silchar, India
IXT	Pasighat, India
IXU	Aurangabad, India
IXV	Along, India
IXW	Jamshedpur, India
IXY	Kandla, India
IXZ	Port Blair, India
IYK	Inyokern, CA [Inyokern Airport], USA
IZA	Santa Ynez, CA [Santa Ynez Airport], USA
IZM	Izmir [Adnan Menderes], Turkey
IZO	Izumo, Japan
IZT	Ixtepec, Mexico