| 1 | KH | Heli-shuttle BVBA | Designator KH recalled by IATA | B | AVCODES |
| 2 | KH | Horizon Airlines Pty Ltd. | ICAO: HZA, Callsign: Horiz Air, IATA designator changed from YK* / Designator HK* recalled by IATA | AUS | AVCODES |
| 3 | KH | Cook Island Airways | | NZ | AVCODES |
| 4 | KH | Cook Islands Airways Ltd. | ICAO: KHH, Callsign: Kilo Hotel, | COK | AVCODES |
| 5 | KH | Kyrgyz Airways Limited | Designator KH recalled by IATA | KS | AVCODES |
| 6 | KH | Aeko Kula, Inc d/b/a Aloha Air Cargo | ICAO: AAH, Callsign: Aloha, IATA Prefix: 687, | USA | AVCODES |
| 7 | KHA | Kitty Hawk Aircargo, Inc. | {`IATA: KR, Callsign: Air Kittyhawwk, IATA Prefix: 798, Founded in 1976 as Kitty Hawk Airways). Commenced operations in 1985. Ceased operations in 2008. Name changed from Kitty Hawk Air Cargo, Inc.`};SRCKEY=AVCODES | USA | |
| 8 | KHA | Kitty Hawk Air Cargo, Inc. | IATA: KR, Callsign: Air Kittyhawwk, IATA Prefix: 798, Name changed to Kitty Hawk Aircargo, Inc. | USA | AVCODES |
| 9 | KHA | Kitty Hawk Airways d/b/a 135 Airways, Inc. | IATA: 2K, Name changed to Kitty Hawk Air Cargo, Inc. | USA | AVCODES |
| 10 | KHA | Kitty Hawk Aircargo | | | ICAO1 |
| 11 | KHAL | KHALIS TRANSPORT INC | | | SCAC4 |
| 12 | KHAN | KHAN, FAROUK | | | SCAC4 |
| 13 | KHAR | Kharkov Transport | | UA | TRAFFIC |
| 14 | KHAY | KUHN HAY | | | SCAC3 |
| 15 | KHAY | KUHN HAY INC | | | SCAC4 |
| 16 | KHB | Khabarovsk Aviation Group | IATA: H8, Callsign: Khabarovsk Air, Name changed to Dalavia - Far East Airways - Khabarovsk | RUS | AVCODES |
| 17 | KHB | Dalavia | IATA: H8 | | ICAO1 |
| 18 | KHB | Kagerup - Helsinge Banen (Helsingebanen) | 1897 - 1945 | DK | jernbanen.dk |
| 19 | KHB | Dalavia — Far Eastern Airways | | RUS | TRAFFIC |
| 20 | KHC | Kitty Hawk Airways | Callsign: Cargo Hawk, | USA | AVCODES |
| 21 | KHC | Kitty Hawk Airways | | | ICAO1 |
| 22 | KHCU | GUANGDONG KEHENG JILI IOT EQUIPMENT CO., LTD. | | PRC | BIC |
| 23 | KHCX | Chief Petty Paper | added 10/1988; eliminated 1/1991 | | NAKINA |
| 24 | KHCX | Chief Petty Paper | added 10/88; eliminated 1/91 | | NRHS |
| 25 | KHCX | CHIEF PETTY PAPER | | | PWRC |
| 26 | KHCZ | KOCH CARBON | | | PWRC |
| 27 | KHDA | K & H DISPATCH COURIERS LTD | | | SCAC4 |
| 28 | KHDS | KP HOME DELIVERY SERVICES | | | SCAC4 |
| 29 | KHDT | KIRBY, H DOUGLAS TRUCKING | | | SCAC3 |
| 30 | KHE | Kanfey-Ha'emek Aviation d/b/a Emek Wings | IATA: RF, Callsign: Kanfey Haemek, Name changed to Israir in September 1996. | IL | AVCODES |
| 31 | KHEA | KITTY HAWK EXPRESS AIR TRUCKWAYS IN | | | SCAC4 |
| 32 | KHEB | K H EXPEDITE LLC | | | SCAC4 |
| 33 | KHEH | KHEHRA TRUCKING INC | | | SCAC4 |
| 34 | KHEL | KHELA BROS TRANSPORT LTD | | | SCAC4 |
| 35 | KHEP | KEHE ENTERPRISES INC | | | SCAC3 |
| 36 | KHEP | KEHE ENTERPRISES | | | SCAC4 |
| 37 | KHET | KINGS HOTSHOT EXPRESS | | | SCAC4 |
| 38 | KHF | Regional State Unitary Enterprise Khabarovsk Airlines | Callsign: Khabarovsk, | RUS | AVCODES |
| 39 | KHFA | K & H FARMS LLC | | | SCAC4 |
| 40 | KHFI | KITCHEN FARMS INC | | | SCAC4 |
| 41 | KHFM | KENT HILL FARMS | | | SCAC4 |
| 42 | KHGI | KISH-GON-DUG CANADA INC | | | SCAC4 |
| 43 | KHGT | KENRICH HANDLING & TRUCKING COMPANY | | | SCAC3 |
| 44 | KHGU | KERNTECHNISCHE HILFSDIENST GMBH | | | SCAC3 |
| 45 | KHGU | KERNTECHNISCHE HILFSDIENST GMBH | | | SCAC4 |
| 46 | KHH | Cook Islands Airways Ltd. | IATA: KH, Callsign: Kilo Hotel, | COK | AVCODES |
| 47 | KHH | Alexandria Airlines | IATA: DQ, | ET | AVCODES |
| 48 | KHH | Alexandria Airlines | | | ICAO1 |
| 49 | KHHL | KORN HARVESTING & HAULING LLC | | | SCAC4 |
| 50 | KHIJ | KEETER HARLEY I JR | | | SCAC3 |
| 51 | KHJ | Köping - Hults Järnväg | 1856 - 1897 | S | svenska-lok.se |
| 52 | KHJM | KOCH, JO ANN M | | | SCAC4 |
| 53 | KHJU | MAERSK A/S | | DK | BIC |
| 54 | KHJU | HAMBURG SUED | | | SCAC4 |
| 55 | KHJV | KOCH, JOHN VERNON | | | SCAC3 |
| 56 | KHK | Public JSC Kharkiv Airlines | IATA: KT, Callsign: Sunray, IATA dsignator changed to KW | UA | AVCODES |
| 57 | KHK | Public JSC Kharkiv Airlines | IATA: KW, Callsign: Sunray, Ceased operation in March 2015. Designator KW recalled by IATA. IATA dsignator changed from KT | UA | AVCODES |
| 58 | KHKB | KOHAN KOBAYASHI CANADA INC | | | SCAC4 |
| 59 | KHKD | HAERKULES KHDK s.r.o. | | CZ | VKM |
| 60 | KHKG | KOCH TRUCKING | | | SCAC4 |
| 61 | KHKI | KOCH TRUCKING INC | | | SCAC4 |
| 62 | KHKV | OZ-Klub historických koľajových vozidiel pri RD Haniska pri Košiciach | | SK | VKM |
| 63 | KHL | KENTRON HAWAII LTD. | | | PWRC |
| 64 | KHLC | KITSONS HAULING LLC | | | SCAC4 |
| 65 | KHLD | KROCUS HOLDINGS LTD | | | SCAC4 |
| 66 | KHLI | KOHEL INTERSTATE TRANSPORT CORP | | | SCAC4 |
| 67 | KHLN | KITTY HAWK LOGISTICS INC | | | SCAC4 |
| 68 | KHLQ | KOHALA EXPRESS | | | SCAC3 |
| 69 | KHLU | MAERSK A/S | | DK | BIC |
| 70 | KHLU | HAMBURG SUED | | | SCAC4 |
| 71 | KHM | Cambodia Airlines Co. Ltd. | IATA: Y6, Callsign: Cambodia Airlines, IATA designator changed to DI. Designator Y6* reinstated by IATA | K | AVCODES |
| 72 | KHM | Cambodia Airlines Co. Ltd. | IATA: DI, Callsign: Cambodia Airlines, IATA designator changed from Y6*. Designator Y6* reinstated by IATA | K | AVCODES |
| 73 | KHM | Cambodia Airlines | | | ICAO1 |
| 74 | KHMC | KELLY, H M, INC | | | SCAC3 |
| 75 | KHMC | KELLY, H M, INC | | | SCAC4 |
| 76 | KHMO | KEHM OIL COMPANY | | | SCAC4 |
| 77 | KHMQ | KOHLS MOTOR TRANSFER COMPANY | | | SCAC3 |
| 78 | KHMS | KAHN MOTOR SERVICE | | | SCAC3 |
| 79 | KHMS | KHM SPEEDY TRANSPORT INC | | | SCAC4 |
| 80 | KHN | Kazakhstan Airlines | Callsign: Nesli, | KZ | AVCODES |
| 81 | KHN | Khaan Airlines Co., Ltd. | | MGL | AVCODES |
| 82 | KHNA | KHANIA SHIPPING INC ATHENS GREECE | | | SCAC3 |
| 83 | KHNK | KAHN TRUCKING | | | SCAC4 |
| 84 | KHNN | KUEHN AND NAGEL | | | SCAC3 |
| 85 | KHNN | KUEHNE & NAGEL INC | | | SCAC4 |
| 86 | KHNS | KUHNS, BILL TRUCKING | | | SCAC3 |
| 87 | KHNT | KUHN TRANSPORTATION COMPANY, INC | | | SCAC3 |
| 88 | KHO | Khors Aircompany Ltd. | IATA: X9, Callsign: Aircompany Khors, IATA Prefix: 852, | UA | AVCODES |
| 89 | KHO | Aircompany "KHORS" Ltd. | IATA: KO, Ceased operation. | UA | AVCODES |
| 90 | KHO | Khors Aircompany | | | ICAO1 |
| 91 | KHOE | KNOTHOLE ENTERPRISES INCORPORATED | | | SCAC3 |
| 92 | KHP | Khozestan Photros Air Lines | Callsign: Photros Air, | IR | AVCODES |
| 93 | KHP | Khoezestan Photros Air Lines | | | ICAO1 |
| 94 | KHPC | KUHN, PAUL COMPANY INC | | | SCAC3 |
| 95 | KHR | Khazar | Callsign: Khazair, | TM | AVCODES |
| 96 | KHR | Khazar | | | ICAO1 |
| 97 | KHRC | KOCH, RICK OIL COMPANY | | | SCAC4 |
| 98 | KHRX | Kamloops Heritage Ry. Society | added 10/2003; eliminated 4/2004; 7/2005 (not listed) | | NAKINA |
| 99 | KHRX | KAMLOOPS HERITAGE RWY. SOCIETY | | | PWRC |
| 100 | KHRX | KAMLOOPS HERITAGE RAILWAY SOCIETY | | | SCAC4 |
