| 1 | KG | Linea Aerea I.A.A.C.A. (L.A.I.) | ICAO: BNX, Callsign: Air Barinas, IATA Prefix: 102, Founded in 1992. Ceased operations on 27 September 2006. | YV | AVCODES |
| 2 | KG | Key Lime Air Corporation | ICAO: LYM, Callsign: Key Lime, IATA designator changed to KG. | USA | AVCODES |
| 3 | KG | Air Sur | ICAO: NCR, Callsign: Nacar, Formerly Canafrica Transportes A�reos SA | E | AVCODES |
| 4 | KG | Caledonian Airways Limited | ICAO: CKT, Callsign: Caledonian, Merged into JMC 27 March 2002. | GB | AVCODES |
| 5 | KG | Canafrica Transportes Aéreos SA | ICAO: NCR, Callsign: Nacar, Renamed Air Sur | E | AVCODES |
| 6 | KG | Orion Airways | ICAO: ORN, Callsign: Orion, Founded in 1979. Merged into Britannia Airways. | GB | AVCODES |
| 7 | KG | Cardinal Air Taxis Ltd. | Callsign: Cardinal, | GB | AVCODES |
| 8 | KG | Empresa de Aviacion Aerogaviota, S.A. | ICAO: GTV, Callsign: Gaviota, Founded on 02 December 1982. | C | AVCODES |
| 9 | KG | Key Lime Air Corporation | ICAO: LYM, Callsign: Key Lime, IATA designator changed from KG*. | USA | AVCODES |
| 10 | KG | Kölngleis Gleisbau GmbH & Co. KG | | DE | VKM |
| 11 | KGA | Kyrgyzstan Airlines / National Airline | IATA: R8, Callsign: Kyrgyz, IATA Prefix: 758, Founded in 1993. Ceased operations in 2005. | KS | AVCODES |
| 12 | KGA | Kyrghyzstan Airlines | IATA: K2, Callsign: Kyrair, IATA Prefix: 758, ICAO designator changed to KGY | KS | AVCODES |
| 13 | KGA | Kyrgyzstan Airlines | IATA: R8 | | ICAO1 |
| 14 | KGA | Karlskoga Kommun | | SE | VKM |
| 15 | KGAC | KGA CARRIERS INC | | | SCAC4 |
| 16 | KGAJ | KNAGGS, ARNOLD JAMES | | | SCAC4 |
| 17 | KGAQ | KING, GARFIELD A | | | SCAC3 |
| 18 | KGAT | KUESEL, G A TRUCKING | | | SCAC3 |
| 19 | KGB | Kyrgyz General Aviation | Callsign: Kemin, | KS | AVCODES |
| 20 | KGB | Sapsan Airlines d/b/a SAPSAN Airline | IATA: S2, Callsign: Sapsan, IATA Prefix: 708, | KS | AVCODES |
| 21 | KGB | Kyrgz General Aviation | | | ICAO1 |
| 22 | KGB | Kewaunee, Green Bay & Western R.R. Co. | 4/1938-10/1966 | | NAKINA |
| 23 | KGB | Kewaunee, Green Bay & Western R.R. Co. | 4/38-10/66 | | NRHS |
| 24 | KGB | FOX VALLEY & WESTERN, LTD. [KEWAUNEE, GREEN BAY & WESTERN RR] | | | PWRC |
| 25 | KGB | Kewaunee, Green Bay & Western R.R. Co. | | USA | TRAFFIC |
| 26 | KGBG | KINGSBURG TRUCKING INC | | | SCAC3 |
| 27 | KGBL | KGB TRUCKING LLC | | | SCAC4 |
| 28 | KGBQ | K G B DISTRIBUTORS INC | | | SCAC3 |
| 29 | KGBTK | Köhnke Geräte- und Bau GmbH | | DE | VKM |
| 30 | KGBX | National Car Co. | 1/1943-1/1946 | | NAKINA |
| 31 | KGBX | NATIONAL CAR CO. | | | PWRC |
| 32 | KGC | Peach Air | Callsign: Goldcrest, Founded in 1996. Merged into Thomas Cook in 1999. | GB | AVCODES |
| 33 | KGC | Air KG | Callsign: Salam Air, | KS | AVCODES |
| 34 | KGC | Peach Air | | | ICAO1 |
| 35 | KGCA | KINGSVILLE CARTAGE | | | SCAC4 |
| 36 | KGCH | KEGLEY CHARTER SERVICE | | | SCAC3 |
| 37 | KGCH | KOSIOR, DAVID | | | SCAC4 |
| 38 | KGCO | K G CONSTRUCTION COMPANY | | | SCAC3 |
| 39 | KGCS | KING CONSTRUCTION COMPANY INC | | | SCAC3 |
| 40 | KGCT | KGJS CEMENT A/S | | | SCAC4 |
| 41 | KGCU | KAMIGUMI CO., LTD | | | SCAC3 |
| 42 | KGCX | INDSPEC Chemical Corp. | added 10/1989; 1/1994; eliminated 1/1998; 7/2000-7/2005 | | NAKINA |
| 43 | KGCX | Koppers Co., Inc. | added 4/1955; 10/1957-1/1980; eliminated 10/1989 | | NAKINA |
| 44 | KGCX | Koppers Co., Inc. | added 4/55; 10/57-1/80; eliminated 10/89 | | NRHS |
| 45 | KGCX | INDSPEC Chemical Corp. | added 10/89; 1/94; eliminated 1/98; 7/2000 | | NRHS |
| 46 | KGCX | INDSPEC CHEMICAL CORPORATION [KOPPERS CO.] | | | PWRC |
| 47 | KGCX | Koppers (INDSPEC Chemical Corporation) | | | RSRV |
| 48 | KGCX | INDSPEC CHEMICAL CORPORATION | | | SCAC4 |
| 49 | KGCZ | KOKOMO GRAIN COMPANY | | | PWRC |
| 50 | KGD | Air Concorde | Callsign: Concorde Air, Ceased Operations. | BG | AVCODES |
| 51 | KGD | Air Concorde | | | ICAO1 |
| 52 | KGDI | K-G DISTRIBUTION SERVICES INC | | | SCAC3 |
| 53 | KGDK | KING, G D TRUCKING | | | SCAC4 |
| 54 | KGDL | KGD LEASING INC | | | SCAC3 |
| 55 | KGDM | KINGDOM CITY TRUCKING INC | | | SCAC3 |
| 56 | KGDS | KG DISTRIBUTIONS INC | | | SCAC3 |
| 57 | KGDS | K & G DELIVERY SERVICE INC | | | SCAC4 |
| 58 | KGDT | KEMP, GORDON TRUCKING | | | SCAC3 |
| 59 | KGDT | KIRANPAL GOODS CARRIER LTD | | | SCAC4 |
| 60 | KGEE | KOHLER, GERALD | | | SCAC4 |
| 61 | KGEH | KLINE, GARY E | | | SCAC4 |
| 62 | KGEI | KING, G ENTERPRISES INC | | | SCAC3 |
| 63 | KGEL | KAGEL TRUCKING INC | | | SCAC3 |
| 64 | KGEO | KENNEDY, GEO F INC | | | SCAC3 |
| 65 | KGEO | KINGSLEY SHIPPING COMPANY LIMITED | | | SCAC4 |
| 66 | KGES | KARRGO FREIGHT LOGISTICS LLC | | | SCAC4 |
| 67 | KGET | KELLER, G & E TRANSPORTATION | | | SCAC3 |
| 68 | KGEZ | KANSAS GAS & ELECTRIC | | | PWRC |
| 69 | KGFD | KINGSFORD LINES LIMITED | | | SCAC3 |
| 70 | KGFG | K & G FREIGHT | | | SCAC4 |
| 71 | KGFL | KING FREIGHT LINES LIMITED | | | SCAC3 |
| 72 | KGFL | KING FREIGHT LINES LIMITED | | | SCAC4 |
| 73 | KGFR | KG FREIGHT CARRIERS INC | | | SCAC4 |
| 74 | KGFS | KG FISSER & V DOORNUM GMBH & | | | SCAC4 |
| 75 | KGFT | KG TRANSFER INC | | | SCAC4 |
| 76 | KGFX | The Kingsford Co. | added 4/1980; 1/1994-7/2000; eliminated 10/2002; added 4/2005; 7/2005; eliminated 7/2007 | | NAKINA |
| 77 | KGFX | The Kingsford Co. | added 4/80; 1/94-7/2000 | | NRHS |
| 78 | KGFX | KINGSFORD COMPANY, THE | | | PWRC |
| 79 | KGFX | Kingsford | | | RSRV |
| 80 | KGGG | K G GTS GASTRANSPORT SCHIFFAHRT GMB | | | SCAC3 |
| 81 | KGHMG | KGHM Polska Miedz SA Oddział Huta Miedzi Głogów | | PL | VKM |
| 82 | KGHT | KNIGHTS TRUCKING | | | SCAC3 |
| 83 | KGHT | KNIGHTS TRUCKING | | | SCAC4 |
| 84 | KGIC | KG INTERSTATE CARRIERS LTD | | | SCAC4 |
| 85 | KGIN | KAR GAS INC | | | SCAC4 |
| 86 | KGIU | KAMIGUMI U.S.A., INC. | | | SCAC3 |
| 87 | KGIU | KAMIGUMI U S A INC | | | SCAC4 |
| 88 | KGJC | KGJ CEMENT | | | SCAC4 |
| 89 | KGJS | KRISTIAN GERHARD JEBSEN SKIPSREDERI | | | SCAC3 |
| 90 | KGK | Sky KG Airlines | IATA: Y3, Callsign: Kyrgyz Sky, Designator Y3 recalled by IATA. | KS | AVCODES |
| 91 | KGK | Sky KG Airlines | Callsign: Kyrgyz Sky, Designator Y3 recalled by IATA. | KS | AVCODES |
| 92 | KGKN | KINGS TRUCKING INC | | | SCAC3 |
| 93 | KGL | Joint Stock Company Kogalymavia Airlines | IATA: 7K, Callsign: Kogalym, Name changed to Kogalymavia Airlines JSC | RUS | AVCODES |
| 94 | KGL | Kogalymavia Airlines JSC | IATA: 7K, Callsign: Kogalym, Name changed from Joint Stock Company Kogalymavia Airlines. Founded in 1993. | RUS | AVCODES |
| 95 | KGL | Kogalymavia Airlines JSC | IATA: 7K, Callsign: Kogalym, Name changed from Joint Stock Company Kogalymavia Airlines. Founded in 1993. | RUS | AVCODES |
| 96 | KGL | Kogalymavia Air Company | IATA: 7K | | ICAO1 |
| 97 | KGLA | KGL AMERICA INC | | | SCAC4 |
| 98 | KGLC | KC GLOBAL LOGISTICS LLC | | | SCAC4 |
| 99 | KGLG | KING LOGISTICS LLC | | | SCAC4 |
| 100 | KGLN | KELLY GLOBAL LOGISTICS INC | | | SCAC4 |
