| Ahmad Shah Baba International Airport | KDH | Kandahar | AF |
| Akiachak Airport | KKI | Akiachak | US |
| Akutan Airport | KQA | Akutan | US |
| Alexei Leonov Kemerovo International Airport | KEJ | Kemerovo | RU |
| Arlington Municipal Airport | — | Arlington | US |
| Aropa Airport | KIE | Kieta | PG |
| Austin Executive Airport | — | Pflugerville | US |
| Ayatollah Hashemi Rafsanjani International Airport | KER | Kerman | IR |
| Beaver Island Airport | — | Beaver Island | US |
| Birch Creek Airport | KBC | Birch Creek | US |
| Bokhtar International Airport | KQT | Bokhtar | TJ |
| Brevig Mission Airport | KTS | Brevig Mission | US |
| Bucholz Army Air Field | KWA | Kwajalein | MH |
| Burqin Kanas Airport | KJI | Burqin | CN |
| Charlevoix Municipal Airport | — | Charlevoix | US |
| Chignik Airport | KCG | Chignik | US |
| Chignik Lake Airport | KCQ | Chignik Lake | US |
| David the Builder Kutaisi International Airport | KUT | Kopitnari | GE |
| Departi Parbo Airport | KRC | Sungai Penuh | ID |
| Dewadaru Airport | KWB | Karimunjawa | ID |
| East Kimberley Regional (Kununurra) Airport | KNX | Kununurra | AU |
| El Tari Airport | KOE | Kupang | ID |
| Ellison Onizuka Kona International Airport at Keāhole | KOA | Kailua-Kona | US |
| Erie-Ottawa International Airport | — | Port Clinton | US |
| False Pass Airport | KFP | False Pass | US |
| Ganzhou Huangjin Airport | KOW | Ganzhou | CN |
| Grayling Airport | KGX | Grayling | US |
| Guilin Liangjiang International Airport | KWL | Guilin (Lingui) | CN |
| Guiyang Longdongbao International Airport | KWE | Guiyang (Nanming) | CN |
| Gunsan Airport / Gunsan Air Base | KUV | Gunsan | KR |
| Gusti Syamsir Alam Airport | KBU | Stagen | ID |
| Gwangju Airport | KWJ | Gwangju | KR |
| Haluoleo Airport | KDI | Kendari | ID |
| Jalal-Abad Airport | — | Jalal-Abad | KG |
| Jinnah International Airport | KHI | Karachi | PK |
| Kaadedhdhoo Airport | KDM | Huvadhu Atoll | MV |
| Kabul International Airport | KBL | Kabul | AF |
| Kadhdhoo Airport | KDO | Kadhdhoo | MV |
| Kaduna International Airport | KAD | Kaduna | NG |
| Kaghau Airport | KGE | Kagau Island | SB |
| Kagoshima Airport | KOJ | Kagoshima | JP |
| Kahramanmaraş Airport | KCM | Kahramanmaraş | TR |
| Kaieteur Airport | KAI | Kaieteur Falls | GY |
| Kaili Huangping Airport | KJH | Kaili (Huangping) | CN |
| Kaitaia Airport | KAT | Awanui | NZ |
| Kajaani Airport | KAJ | Kajaani | FI |
| Kalamata Airport | KLX | Kalamata | GR |
| Kalbarri Airport | KAX | Kalbarri | AU |
| Kalgoorlie Boulder Airport | KGI | Broadwood | AU |
| Kalibo International Airport | KLO | Kalibo | PH |
| Kalkgurung Airport | KFG | — | AU |
| Kalmar Airport | KLR | Kalmar | SE |
| Kalskag Airport | KLG | Kalskag | US |
| Kaltag Airport | KAL | Kaltag | US |
| Kamembe Airport | KME | Kamembe | RW |
| Kamina City Airport | KMN | Kamina | CD |
| Kananga Airport | KGA | Kananga | CD |
| Kangding Airport | KGT | Garzê (Kangding) | CN |
| Kanpur Airport | KNU | Kanpur | IN |
| Kansai International Airport | KIX | Osaka | JP |
| Kanti Airport | KHM | Kanti | MM |
| Kaohsiung International Airport | KHH | Kaohsiung (Xiaogang) | TW |
| Karamay Airport | KRY | Karamay | CN |
| Karara Airport | KQR | Karara | AU |
| Kärdla Airport | KDL | Kärdla | EE |
| Kariba Airport | KAB | Kariba | ZW |
| Karlovy Vary Airport | KLV | Karlovy Vary | CZ |
| Karlstad Airport | KSD | Karlstad | SE |
| Karluk Airport | KYK | Karluk | US |
| Karratha Airport | KTA | Karratha | AU |
| Kars Airport | KSY | Kars | TR |
| Karshi Airport | KSQ | Karshi | UZ |
| Karumba Airport | KRB | — | AU |
| Kasama Airport | KAA | Kasama | ZM |
| Kashan Airport | KKS | Kashan | IR |
| Kashgar Laining International Airport | KHG | Kashgar | CN |
| Kasigluk Airport | KUK | Kasigluk | US |
| Kasos Airport | KSJ | Kasos Island | GR |
| Kassala Airport | KSL | Kassala | SD |
| Kassel Airport | KSF | Calden | DE |
| Kastelorizo Airport | KZS | Kastelorizo Island | GR |
| Kastoria National Airport Aristotle | KSO | Argos Orestiko | GR |
| Katowice Wojciech Korfanty International Airport | KTW | Katowice | PL |
| Kauehi Airport | KHZ | Kauehi | PF |
| Kaukura Airport | KKR | Raitahiti | PF |
| Kaunas International Airport | KUN | Kaunas | LT |
| Kavala Alexander the Great International Airport | KVA | Kavala | GR |
| Kavieng Airport | KVG | Kavieng | PG |
| Kawthoung Airport | KAW | Kawthoung | MM |
| Kayes Dag Dag Airport | KYS | Kayes | ML |
| Kazan International Airport | KZN | Kazan | RU |
| Keewaywin Airport | KEW | Keewaywin | CA |
| Keflavik International Airport | KEF | Reykjavík | IS |
| Kemi-Tornio Airport | KEM | Kemi / Tornio | FI |
| Kengtung Airport | KET | Kengtung | MM |
| Keperveem Airport | KPW | Keperveem | RU |
| Kerben Airport | — | Kerben | KG |
| Kerema Airport | KMA | Kerema | PG |
| Kerikeri Airport | KKE | Kerikeri | NZ |
| Kerry Airport | KIR | Farranfore | IE |
| Kertajati International Airport | KJT | Kertajati | ID |
| Ketchikan International Airport | KTN | Ketchikan | US |
| Khabarovsk Novy Airport | KHV | Khabarovsk | RU |
| Khark Airport | KHK | Khark | IR |
| Khartoum International Airport | KRT | Khartoum | SD |
| Khasab Airport | KHS | Khasab | OM |
| Kherson International Airport | KHE | Kherson | UA |
| Khon Kaen Airport | KKC | Khon Kaen | TH |
| Khoram Abad Airport | KHD | — | IR |
| Khost International Airport | KHT | Khost | AF |
| Khrabrovo Airport | KGD | Kaliningrad | RU |
| Khuzdar Airport | KDD | Khuzdar | PK |
| Kigali International Airport | KGL | Kigali | RW |
| Kikai Airport | KKX | Kikai | JP |
| Kikori Airport | KRI | Kikori | PG |
| Kikwit Airport | KKW | Kikwit | CD |
| Kili Airport | KIO | Kili Island | MH |
| Kimberley Airport | KIM | Kimberley | ZA |
| Kindu Airport | KND | Kindu | CD |
| King Cove Airport | KVC | King Cove | US |
| King Island Airport | KNS | — | AU |
| King Khaled Military City Airport | KMC | King Khaled Military City | SA |
| Kingfisher Lake Airport | KIF | Kingfisher Lake | CA |
| Kingscote Airport | KGC | — | AU |
| Kinmen Airport | KNH | Shang-I | TW |
| Kipnuk Airport | KPN | Kipnuk | US |
| Kirkenes Airport, Høybuktmoen | KKN | Kirkenes | NO |
| Kirkuk International Airport | KIK | Kirkuk | IQ |
| Kirkwall Airport | KOI | Kirkwall, Orkney Islands | GB |
| Kiruna Airport | KRN | Kiruna | SE |
| Kirundo Airport | KRE | Kirundo | BI |
| Kish International Airport | KIH | Kish Island | IR |
| Kishangarh Airport Ajmer | KQH | Ajmer (Kishangarh) | IN |
| Kisoro Airport | KXO | Kisoro | UG |
| Kisumu International Airport | KIS | Kisumu | KE |
| Kitadaito Airport | KTD | Kitadaitōjima | JP |
| Kitakyushu Airport | KKJ | Kitakyushu | JP |
| Kithira Airport | KIT | Kithira Island | GR |
| Kittilä International Airport | KTT | Kittilä | FI |
| Kivalina Airport | KVL | Kivalina | US |
| Klagenfurt Airport | KLU | Klagenfurt am Wörthersee | AT |
| Klawock Airport | KLW | Klawock | US |
| Kochi Ryoma Airport | KCZ | Nankoku | JP |
| Kogalym International Airport | KGP | Kogalym | RU |
| Koggala Airport | KCT | Galle | LK |
| Kokhanok Airport | KNK | Kokhanok | US |
| Kokkola-Pietarsaari Airport | KOK | Kokkola / Kruunupyy | FI |
| Kokshetau International Airport | KOV | Kokshetau | KZ |
| Kolhapur Airport | KLH | Kolhapur | IN |
| Koliganek Airport | KGK | Koliganek | US |
| Kolwezi Airport | KWZ | Kolwezi | CD |
| Komatsu Airport / JASDF Komatsu Air Base | KMQ | Kanazawa | JP |
| Komsomolsk-on-Amur Airport | KXK | Komsomolsk-on-Amur | RU |
| Koné Airport | KNQ | Koné | NC |
| Kongiganak Airport | KKH | Kongiganak | US |
| Konya Airport | KYA | Konya | TR |
| Korkyt Ata International Airport | KZO | Kyzylorda | KZ |
| Korla Licheng Airport | KRL | Korla | CN |
| Koro Island Airport | KXF | Koro Island | FJ |
| Kos International Airport "Ippokratis" | KGS | Kos Island | GR |
| Košice International Airport | KSC | Košice | SK |
| Kosrae International Airport | KSA | Okat | FM |
| Kostanay International Airport | KSN | Kostanay | KZ |
| Kostroma Sokerkino Airport | KMW | Kostroma | RU |
| Kotlas Airport | KSZ | Kotlas | RU |
| Kotlik Airport | KOT | Kotlik | US |
| Koumac Airport | KOC | Koumac | NC |
| Kowanyama Airport | KWM | Kowanyama | AU |
| Koyuk Alfred Adams Airport | KKA | Koyuk | US |
| Koyukuk Airport | KYU | Koyukuk | US |
| Kozani National Airport Filippos | KZI | Kozani | GR |
| Krabi International Airport | KBV | Krabi | TH |
| Kraków John Paul II International Airport | KRK | Balice | PL |
| Kramfors-Sollefteå Höga Kusten Airport | KRF | Nyland | SE |
| Krasnodar Pashkovsky International Airport | KRR | Krasnodar | RU |
| Krasnoyarsk Cheremshanka Airport | KCY | Krasnoyarsk | RU |
| Krasnoyarsk International Airport | KJA | Krasnoyarsk | RU |
| Kristiansand Airport | KRS | Kristiansand(Kjevik) | NO |
| Kristiansund Airport, Kvernberget | KSU | Kvernberget | NO |
| Kryvyi Rih International Airport | KWG | Kryvyi Rih | UA |
| Kuala Lumpur International Airport | KUL | Sepang | MY |
| Kualanamu International Airport | KNO | Beringin | ID |
| Kuantan Airport | KUA | Kuantan | MY |
| Kubin Island Airport | KUG | Kubin Island | AU |
| Kuching International Airport | KCH | Kuching | MY |
| Kudat Airport | KUD | Kudat | MY |
| Kullu Manali Airport | KUU | Bhuntar | IN |
| Kulusuk Airport | KUS | Kulusuk | GL |
| Kumamoto Airport | KMJ | Kumamoto | JP |
| Kunming Changshui International Airport | KMG | Kunming | CN |
| Kuopio Airport | KUO | Kuopio / Siilinjärvi | FI |
| Kuqa Qiuci Airport | KCA | Kuqa | CN |
| Kurgan Airport | KRO | Kurgan | RU |
| Kurnool Airport | KJB | Orvakal | IN |
| Kurumoch International Airport | KUF | Samara | RU |
| Kushiro Airport | KUH | Kushiro | JP |
| Kuusamo Airport | KAO | Kuusamo | FI |
| Kuwait International Airport | KWI | Kuwait City | KW |
| Kwethluk Airport | KWT | Kwethluk | US |
| Kwigillingok Airport | KWK | Kwigillingok | US |
| Kyaukpyu Airport | KYP | Kyaukpyu | MM |
| Kyzyl Airport | KYZ | Kyzyl | RU |
| Kyzyl-Kiya Airport | — | Kyzyl-Kiya | KG |
| Lanyu Airport | KYD | Orchid Island | TW |
| Larsen Bay Airport | KLN | Larsen Bay | US |
| Mallam Aminu Kano International Airport | KAN | Kano | NG |
| Manokotak Airport | KMO | Manokotak | US |
| Markovo Airport | KVM | Markovo | RU |
| Midtjyllands Airport / Air Base Karup | KRP | Karup | DK |
| Miyazaki Airport | KMI | Miyazaki | JP |
| Morava Airport | KVO | Kraljevo | RS |
| Nakhon Phanom Airport | KOP | Nakhon Phanom | TH |
| Nanchang Changbei International Airport | KHN | Nanchang | CN |
| Nanwalek Airport | KEB | Nanwalek | US |
| Naryn Airport | — | Naryn | KG |
| Nepalgunj Airport | KEP | Nepalgunj | NP |
| New Stuyahok Airport | KNW | New Stuyahok | US |
| Niigata Airport | KIJ | Niigata | JP |
| Norman Manley International Airport | KIN | Kingston | JM |
| Ouzinkie Airport | KOZ | Ouzinkie | US |
| Perryville Airport | KPV | Perryville | US |
| Pobedilovo Airport | KVX | Kirov | RU |
| Pohang Airport (G-815/K-3) | KPO | Pohang | KR |
| Prempeh I International Airport | KMS | Kumasi | GH |
| Qamishli International Airport | KAC | Qamishli | SY |
| Quinhagak Airport | KWN | Quinhagak | US |
| Rahadi Osman Airport | KTG | Ketapang | ID |
| Sangia Nibandera Airport | KXB | Kolaka | ID |
| Sary-Arka Airport | KGF | Karaganda | KZ |
| Savannah Airstrip | KHX | Kihihi | UG |
| Selayar - Haji Aroeppala Airport | KSR | Benteng | ID |
| Seruyan Kuala Pembuang Airport | KLP | Seruyan | ID |
| Shahid Ashrafi Esfahani Airport | KSH | Kermanshah | IR |
| Sihanouk International Airport | KOS | Preah Sihanouk | KH |
| Skardu International Airport | KDU | Skardu | PK |
| St Mary's Airport | KSM | St Mary's | US |
| Sultan Ismail Petra Airport | KBR | Kota Baharu | MY |
| Talas Airport | — | Talas | KG |
| Tamga Airport | — | Tamga | KG |
| Techo International Airport | KTI | Phnom Penh (Boeng Khyang) | KH |
| Tinson Pen Airport | KTP | Tinson Pen | JM |
| Tokmok Airport | — | Tokmok | KG |
| Tribhuvan International Airport | KTM | Kathmandu | NP |
| Turkmenbaşy International Airport | KRW | Turkmenbaşy | TM |
| Ulleung Airport | — | Ulleung-Gun (Ulleung County) | KR |
| Ulleung Airport | — | Ulleung-Gun (Ulleung County) | KR |
| Utarom Airport | KNG | Kaimana | ID |
| Vunisea Airport | KDV | Vunisea | FJ |
| Yakushima Airport | KUM | Yakushima | JP |
| Zafer Airport | KZR | Altıntaş | TR |