| 1 | LK | Lucas Aigle Azur | ICAO: AAF, Name changed to Aigle Azur | F | AVCODES |
| 2 | LK | Air Luxor, S.A. | ICAO: LXR, Callsign: Airluxor, IATA Prefix: 040, ICAO Callsign changed to Luxor | P | AVCODES |
| 3 | LK | Air Luxor, S.A. | ICAO: LXR, Callsign: Luxor, IATA Prefix: 040, Ceased operations in October 2006. Some aircraft transferred to Hi fly. ICAO Callsign changed from Airluxor | P | AVCODES |
| 4 | LK | Arawak Airlines Ltd. | Callsign: Arawak, | TT | AVCODES |
| 5 | LK | Lucas Air Transport | | F | AVCODES |
| 6 | LK | Lao Skyway | ICAO: LLL, Callsign: Lavie, Name change from Lao Air Company. | LAO | AVCODES |
| 7 | LKA | Alkair Flight Operations A/S | Callsign: Alkair, | DK | AVCODES |
| 8 | LKA | Luke Air | Callsign: Luke Air, | M | AVCODES |
| 9 | LKA | Lao Capricorn Air | | | ICAO1 |
| 10 | LKA | Lódzka Kolej Aglomeracyjna | | PL | TRAFFIC |
| 11 | LKA | ŁÓDZKA KOLEJ AGLOMERACYJNA SP. Z O.O. | | PL | VKM |
| 12 | LKAB | Luossavaara-Kiirunavaara Aktiebolag (Malmbanan) | 1890 - | S | svenska-lok.se |
| 13 | LKAB | | | S | TRAFFIC |
| 14 | LKAB | LKAB | | SE | VKM |
| 15 | LKAD | LEVSKI LOGISTIC INC | | | SCAC4 |
| 16 | LKAJ | LINDGREN, K AND J TRUCKING INC | | | SCAC4 |
| 17 | LKAM | LINKAMERICA TRANSPORTATION INC | | | SCAC4 |
| 18 | LKAP | LAKITAS TRANSPORTATION SERVICE INC | | | SCAC3 |
| 19 | LKAR | LAKAR TRUCKING CO | | | SCAC3 |
| 20 | LKAR | LAIRSON TRUCKING LLC | | | SCAC4 |
| 21 | LKAT | LAKES AREA TRASPORT | | | SCAC3 |
| 22 | LKATP1 | Lvov Komunalnij ATP-1 | | UA | TRAFFIC |
| 23 | LKAU | ALKA-GAS NV | | | SCAC4 |
| 24 | LKB | Josef Kolvenbach GmbH & CO KG | | DE | VKM |
| 25 | LKBH | LAKE VIEW BOAT HAULERS | | | SCAC3 |
| 26 | LKBH | LAUREL CREEK TRANSPORT INC | | | SCAC4 |
| 27 | LKBK | LINKAMERICA TRANSPORTATION INC (BRO | | | SCAC4 |
| 28 | LKBL | LUKE, BILLY D | | | SCAC4 |
| 29 | LKCD | LAKE CITY DISTRIBUTION LTD | | | SCAC3 |
| 30 | LKCE | LINK TRUCKING LTD | | | SCAC4 |
| 31 | LKCF | LAKE CHAMPLAIN FERRIES | | | SCAC3 |
| 32 | LKCF | LKC | | | SCAC4 |
| 33 | LKCG | LKC TRUCKING | | | SCAC3 |
| 34 | LKCK | LAKE CITY TRUCKING | | | SCAC3 |
| 35 | LKCK | LAKE CITY TRUCKING | | | SCAC4 |
| 36 | LKCN | LUCKY OIL & GAS | | | SCAC4 |
| 37 | LKCO | LUCKS COMPANY, THE | | | SCAC3 |
| 38 | LKCO | LINK CORPORATION | | | SCAC4 |
| 39 | LKCP | LAKE CHARLES PIPE LINE COMPANY | | | SCAC3 |
| 40 | LKCQ | LUKECORE TRANSPORTATION | | | SCAC4 |
| 41 | LKCS | LAKE CHARLES STEVEDORES INC | | | SCAC3 |
| 42 | LKCT | LUKASIK CARTAGE | | | SCAC3 |
| 43 | LKCU | BW EPIC KOSAN MARITIME | | DK | BIC |
| 44 | LKCU | LAURITZEN KOSAN A/S | | | SCAC4 |
| 45 | LKCW | LAST K C TRANSPORTATION LTD | | | SCAC4 |
| 46 | LKCY | LAKE COUNTY MOVERS INC | | | SCAC3 |
| 47 | LKCY | LAKE COUNTY MOVERS INC | | | SCAC4 |
| 48 | LKD | LAT (Lignes Aeriennes du Tchad) | Callsign: Latchad, | TCH | AVCODES |
| 49 | LKD | Lignes Aeriennes Du Tchad | | | ICAO1 |
| 50 | LKDA | LACKIE, DAVID A | | | SCAC4 |
| 51 | LKDB | LAKEWAY DISTRIBUTION COMPANY INC | | | SCAC3 |
| 52 | LKDF | LAKEFIELD FARM INC | | | SCAC4 |
| 53 | LKDQ | LAKESIDE TRANSFER & SERVICE INC | | | SCAC3 |
| 54 | LKDQ | LINKAMERICA DEDICATED INC | | | SCAC4 |
| 55 | LKDU | BULKUID | | USA | BIC |
| 56 | LKDW | LAMKEY, DWIGHT | | | SCAC4 |
| 57 | LKE | Lucky Air Co. Ltd | IATA: 8L, Callsign: Lucky Air, IATA Prefix: 859, | PRC | AVCODES |
| 58 | LKE | Lucky Air | | | ICAO1 |
| 59 | LKE | Lucky Air | Real: LKE, 8L | PRC | TRAFFIC |
| 60 | LKED | L & K ENTERPRISES | | | SCAC4 |
| 61 | LKEF | LAKER TRANSFER INC | | | SCAC3 |
| 62 | LKEH | LAKE HEBRON TRUCKING CO | | | SCAC3 |
| 63 | LKEH | LINDERS, KENNETH | | | SCAC4 |
| 64 | LKEI | LAKE-COOK CARTAGE INC | | | SCAC3 |
| 65 | LKEL | LAKE ELMO OIL INC | | | SCAC4 |
| 66 | LKEM | LAKESIDE ESTATES MOBILE HOME TRANSP | | | SCAC3 |
| 67 | LKEN | LARSON, KENNETH LLOYD | | | SCAC4 |
| 68 | LKER | LUK E LUK DISTRIBUTION | | | SCAC4 |
| 69 | LKES | LAKE SHUTTLE INC | | | SCAC3 |
| 70 | LKES | LUKES TRUCKING LTD | | | SCAC4 |
| 71 | LKEV | LAFLEUR, KEVIN | | | SCAC4 |
| 72 | LKF | Aviation Advisor, Inc. | Callsign: Lake Front, | USA | AVCODES |
| 73 | LKFF | LAKEFIELD AVIATION INC | | | SCAC3 |
| 74 | LKFG | LAKE FORWARDING INC | | | SCAC3 |
| 75 | LKFM | LOKEMOEN FARMS | | | SCAC3 |
| 76 | LKFR | LAKEHEAD FREIGHTWAYS | | | SCAC3 |
| 77 | LKGA | LKG & ASSOCIATES INC | | | SCAC4 |
| 78 | LKGF | LILLY, KENNETH G FASTENERS INC | | | SCAC4 |
| 79 | LKGH | LAKETOWN GREENHOUSE | | | SCAC4 |
| 80 | LKH | Small Planet Airlines Co., Ltd. | IATA: RD, Callsign: Skyplanet, Founded in October 2017. Ceased operations on 09 November 2018. | K | AVCODES |
| 81 | LKHA | LIVESTOCK HAULING | | | SCAC3 |
| 82 | LKHA | LANKHAAR COMPANY | | | SCAC4 |
| 83 | LKHD | LAKEHEAD PIPE LINE COMPANY INC | | | SCAC3 |
| 84 | LKHD | LAKEHEAD MOTORS LIMITED, THE | | | SCAC4 |
| 85 | LKHG | LEAKE, HUGHIE | | | SCAC3 |
| 86 | LKHO | LAKEHEAD OIL CO INC | | | SCAC4 |
| 87 | LKHS | LOCKHART, DWIGHT E & COMPANY TRUCKI | | | SCAC4 |
| 88 | LKHT | LAKEHEAD TRUCKING INC | | | SCAC3 |
| 89 | LKHT | LUCKHART TRANSPORT LIMITED | | | SCAC4 |
| 90 | LKIA | LAKIN, A & SONS INC | | | SCAC3 |
| 91 | LKIC | LAURENTIDE KITCHENS INC | | | SCAC4 |
| 92 | LKII | L & K INDUSTRIES INC | | | SCAC3 |
| 93 | LKIS | LARSEN, KNUD I SHIPPING CO | | | SCAC3 |
| 94 | LKIT | LITTLEFIELD, KIT | | | SCAC3 |
| 95 | LKJA | LAMBRECHT, K J TRUCKING | | | SCAC4 |
| 96 | LKJE | LARKIN, JAMES E INC | | | SCAC3 |
| 97 | LKJE | LESNIAK, JEROME E | | | SCAC4 |
| 98 | LKJL | LUCKY JULIO S A | | | SCAC4 |
| 99 | LKJM | L K J ENTERPRISES | | | SCAC3 |
| 100 | LKJT | LEE, KEN J & SONS TRUCKING | | | SCAC3 |
