| Known As / Full Name | URL |
|---|---|
| K2 Airways / K2 Airways | k2airways.com |
| K2 Airways / K2 Airways | www.k2airways.com |
| K5-Aviation / K5-Aviation GmbH | www.k5-aviation.com |
| Kabul Air / Kabul Air Company | www.kabulair.org |
| KaiserAir / KaiserAir, Inc. | www.kaiserair.com |
| Kaliningrad Air Enterprise / Kaliningrad Air Enterprise | www.byteciyt.ru/~avia/ |
| Kalitta Air / Kalitta Air LLC | www.kalittaair.com |
| Kalitta Charters / Kalitta Charters LLC | www.kalittacharters.com |
| Kalitta Charters II / Kalitta Charters II, LLC | www.kalittacharters.com |
| Kam Air / Kam Air | www.flykamair.com |
| Kamaka Air / Kamaka Air, Inc. | www.kamakaair.com |
| Kangala Air Express / Kangala Air Express | kangalaairexpress.com |
| Kansas Highway Patrol / Kansas Highway Patrol | www.kansashighwaypatrol.org |
| Kapajet / Kapajet S.A. | www.kapajet.gr |
| Kapital Aviation / Kapital Aviation | www.kapitalaviation.co.uk |
| Karinou Airlines / Karinou Airlines | karinou.worldticket.net/en |
| Karun Airlines / Karun Airlines | www.karunair.ir/en |
| Kazan Plant Of Helicopters / Kazan Plant Of Helicopters | www.kazanhelicopters.com |
| Keenair Charter / Keenair Charter Ltd. | www.keenair.co.uk |
| Keewatin Air / Keewatin Air Ltd. | www.kivalliqair.com |
| Kelowna Flightcraft Air / Kelowna Flightcraft Air Charter Ltd. | www.flightcraft.ca |
| Kenai Aviation / Kenai Aviation Operations, LLC | www.kenaiaviation.com |
| Kenmore Air / Kenmore Air Harbor, Inc. t/a Kenmore Air | www.kenmoreair.com |
| Kenmore Air / Kenmore Air | www.kenmoreair.com |
| Kenn Borek Air / Kenn Borek Air Ltd. | www.borekair.com |
| Kent State University / Kent State University | www.kent.edu |
| Kenya Airways / Kenya Airways | www.kenya-airways.com |
| Kermas Aviation / Kermas Aviation Ltd. | www.flykermas.com |
| Kestral Aviation / Kestral Aviation | www.kestralaviation.com |
| Key Air / Key Air, LLC. | www.keyair.com |
| Key Lime Air / Key Lime Air Corporation | www.keylimeair.com |
| Key Publishing (Holdings) Ltd. / Key Publishing (Holdings) Ltd. | www.keymags.co.uk |
| Keystone Air Service / Keystone Air Service | www.keystoneair.mb.ca |
| Khabarovsk Airlines / Regional State Unitary Enterprise Khabarovsk Airlines | khabavia.ru |
| Khoriv-Avia / Khoriv-Avia, State Enterprise | khoriv-avia.com |
| King Air Charter / King Air Charter | www.kingair.co.za |
| Kiss Air / Kiss Air | www.kissair.com |
| KlasJet / JSC KlasJet | www.klasjet.aero |
| KLM Cityhopper / KLM Cityhopper | www.klmcityhopper.com |
| KLM Royal Dutch Airlines / KLM Royal Dutch Airlines (Koninklijke Luchtvaart Maatschappij N.V.) | www.klm.com |
| KM Malta Airlines / KM Malta Airlines plc | www.kmmaltairlines.com |
| K-Mile Air / K-Mile Air Co. Ltd. | www.k-mile.com |
| KN Helicopters / KN Helicopters A/S | www.knhelicopters.dk |
| Koala Airlines / Koala Airlines Pty Ltd | koalaair.com.au |
| Komiaviatrans / Komiaviatrans Open Joint Stock Company | www.komiaviatrans.ru |
| Kommunalförbundet Ambulanshelikopter Värmland-Dalarna / Kommunalförbundet Ambulanshelikopter Värmland-Dalarna | www.regiondalarna.se |
| Korea Aerospace University / Korea Aerospace University | www.kau.ac.kr |
| Korea National University of Transportation / Korea National University of Transportation | genglish.ut.ac.kr |
| Korean Air / Korean Air | www.koreanair.com |
| Kosmos / Kosmos | www.ntsi.mtu-net.ru/~kosmos/ |
| Kostroma Air Enterprise / Kostroma Air Enterprise | www.kostroma-avia.ru |
| Krasavia / Krasavia, Joint-Stock Company | www.ak-krasavia.ru |
| Kremenchuk Flight College / Kremenchuk Flight College | www.flightcollege.com.ua |
| KS Avia / KS Avia | www.ksavia.lv |
| Kudos Aviation / Kudos Aviation Ltd. | www.kudosaviation.com |
| Kunming Airlines / Kunming Airlines Co., Ltd. | www.airkunming.com |
| Kush Aviation / Kush Aviation Co. Ltd. | www.kushair.net |
| Kuwait Airways / Kuwait Airways | www.kuwaitairways.com |
| Kyrgyz Air / Kyrgyz Air | www.kyrgyzair.com |
| Kyungwoon University / Kyungwoon University | www.ikw.ac.kr |