| 1 | LL | Lineas Aereas Allegro, S.A. de C.V. | ICAO: GRO, Callsign: Allegro, IATA Prefix: 902, Founded in 1992. Ceased operations during 2004. | MEX | AVCODES |
| 2 | LL | Loftleidir, Icelandic Airlines Ltd. | Callsign: Loftleidir, | IS | AVCODES |
| 3 | LL | Aero Lloyd Flugreisen GmbH & Co. | ICAO: AEF, Callsign: Aero Lloyd, Founded on 20 December 1980. Commenced operations in March 1981. IATA designator changed to YP | D | AVCODES |
| 4 | LL | Miami Air International, Inc. | ICAO: BSK, Callsign: Biscayne, Commenced operations in October 1991. Ceased opeations on 08 May 2020. IATA designator changed from GL* | USA | AVCODES |
| 5 | LL | China General Aviation Ltd | | PRC | AVCODES |
| 6 | LL | Poplar River Mine Railroad | | | RSRV |
| 7 | LLA | Servicio Leo Lopez S.A. de C.V. | Callsign: Leo Lopez, | MEX | AVCODES |
| 8 | LLA | Servico Leo Lopex | | | ICAO1 |
| 9 | LLA | Lubelskie Linie Autobusowe | | PL | TRAFFIC |
| 10 | LLAA | LOGISTICS 1-2-3 LTD | | | SCAC4 |
| 11 | LLAB | LASER LINES LIMITED | | | SCAC3 |
| 12 | LLAB | LASER LINES LIMITED | | | SCAC4 |
| 13 | LLAE | LCG LOGISTICS LLC | | | SCAC4 |
| 14 | LLAF | LEECO LOGISTICS LLC | | | SCAC4 |
| 15 | LLAG | LIBERTY LOGISTICS LLC | | | SCAC4 |
| 16 | LLAK | LANDMARK LOGISTICS INC | | | SCAC4 |
| 17 | LLAM | LOGISTICA LAM SA DE CV | | | SCAC4 |
| 18 | LLAN | LAKELAND EQUIPMENT CORP | | | SCAC4 |
| 19 | LLAQ | LIQUITRAN LLC | | | SCAC4 |
| 20 | LLAR | LONG, LAMAR | | | SCAC4 |
| 21 | LLAS | LAND LINE TRANSPORT | | | SCAC4 |
| 22 | LLAT | LONG, L A TRUCKING INC | | | SCAC3 |
| 23 | LLAU | ABL SPACE SYSTEMS | | USA | BIC |
| 24 | LLB | Lloyd Aereo Boliviano S.A. (LAB) | IATA: LB, Callsign: Lloydaereo, IATA Prefix: 051, Ceased Operations | BOL | AVCODES |
| 25 | LLB | Lloyd Aereo Boliviano | IATA: LB | | ICAO1 |
| 26 | LLB | Leuk-Leukerbad-Bahn / Chemin de Fer Electrique de Loèche-les-Bains | | CH | TRAFFIC |
| 27 | LLBA | Linzer Lokalbahn | Real: LLB, Original company name until 2000. In 2000 renamed to LILO. | A | TRAFFIC |
| 28 | LLBC | LLB CARTAGE INC | | | SCAC3 |
| 29 | LLBG | LILLIBRIDGE TRANSPORTATION INC | | | SCAC4 |
| 30 | LLBT | L L & L FARMS-TRUCKING | | | SCAC4 |
| 31 | LLBU | LLOYD BRASILEIRO LINE, INC. | | | SCAC3 |
| 32 | LLBU | LLOYD BRASILEIRO LINE, INC. | | | SCAC4 |
| 33 | LLC | Lankalink Aircargo (Pvt) Ltd. | Callsign: Lankalink, | CL | AVCODES |
| 34 | LLC | FlyLAL Charters JSC | Callsign: flyLAL Charters, Name changed to Small Planet Airlines AS. during 2012. Part of the Avia Solutions Group. | LT | AVCODES |
| 35 | LLC | Small Planet Airlines AS. | Callsign: Lima Lima Charley, Name changed from FlyLAL Charters JSC. Part of the Avia Solutions Group. | LT | AVCODES |
| 36 | LLC | Small Planet Airlines UAB | IATA: S5, Callsign: Small Planet, Ceased operations on 28 November 2018. | LT | AVCODES |
| 37 | LLCE | LANDIS LUXUARY COACHES | | | SCAC3 |
| 38 | LLCE | LOGIN LOGISTICS LTD | | | SCAC4 |
| 39 | LLCF | LEEK LOGISTICS CORPORATION | | | SCAC4 |
| 40 | LLCH | LIBERTY LOGISTICS LLC | | | SCAC4 |
| 41 | LLCI | LILCO INC | | | SCAC3 |
| 42 | LLCJ | LAYDEN LOGISTICS COMPANY INC | | | SCAC4 |
| 43 | LLCN | LELCO INC | | | SCAC3 |
| 44 | LLCO | L & L CONTRACTORS DELIVERY CORP | | | SCAC3 |
| 45 | LLCO | LUCIA LUMBER COMPANY INC | | | SCAC4 |
| 46 | LLCP | L & L CONTAINER CORP | | | SCAC3 |
| 47 | LLCQ | LOYALIST LOGISTICS CORPORATION | | | SCAC4 |
| 48 | LLCR | L & L CHARTER | | | SCAC3 |
| 49 | LLCS | LLAMAS CONSTRUCTION COMPANY | | | SCAC3 |
| 50 | LLCS | L & L CARRIERS | | | SCAC4 |
| 51 | LLCT | LONG LINE CORP, THE | | | SCAC3 |
| 52 | LLCW | LIVE LOBSTER CO INC | | | SCAC4 |
| 53 | LLCX | LLCX Inc. | added 10/1985; 1/1994-7/2005; eliminated 1/2009 | | NAKINA |
| 54 | LLCX | Lyon Lumber Co. | 8/1920 | | NAKINA |
| 55 | LLCX | LLCX Inc. | 1/94-7/2000 | | NRHS |
| 56 | LLCX | *LYON LUMBER CO. | | | PWRC |
| 57 | LLCX | +LLCX INCORPORATED | | | PWRC |
| 58 | LLCX | LLCX Inc. | | | RSRV |
| 59 | LLCY | LEE LUMBER COMPANY LLC | | | SCAC4 |
| 60 | LLD | Lloyd Aviation, C.A. | Callsign: Avia Lloyd, | YV | AVCODES |
| 61 | LLDS | L AND L DELIVERY SERVICE | | | SCAC3 |
| 62 | LLDU | TRADECORP INTERNATIONAL PTY LTD | | | SCAC4 |
| 63 | LLDY | LUCKY LADY OIL COMPANY | | | SCAC4 |
| 64 | LLE | Aerotransporte Convalles | Callsign: Convalles, | YV | AVCODES |
| 65 | LLED | LT LOGISTICA | | | SCAC4 |
| 66 | LLEE | LEFT LANE EXPRESS INC | | | SCAC4 |
| 67 | LLEP | LYON & LYON ENTERPRISES | | | SCAC3 |
| 68 | LLEQ | L & L | | | SCAC4 |
| 69 | LLES | LITTLE LEAGUE EQUIPMENT SALES LTD | | | SCAC4 |
| 70 | LLET | LEWIS, L E TRANS | | | SCAC3 |
| 71 | LLEY | LILLEY, D TRANSPORTATION INC | | | SCAC3 |
| 72 | LLFD | LALONDE, LEWIS FENCING LTD | | | SCAC4 |
| 73 | LLFE | LONG LASTING FARM EQUIPMENT CO INC | | | SCAC3 |
| 74 | LLFL | L & L FREIGHT LINE INC | | | SCAC3 |
| 75 | LLFL | LOWES LUMBER & FURNITURE LTD | | | SCAC4 |
| 76 | LLFS | LLT FARMS INC | | | SCAC3 |
| 77 | LLFS | LINCOLN LAND FS INC | | | SCAC4 |
| 78 | LLFV | LONGHORN LOGISTICS & FREIGHT | | | SCAC4 |
| 79 | LLG | Luftline Georgia Ltd | IATA: GX, Callsign: Kakheti, IATA Prefix: 559, Ceased operations. | GE | AVCODES |
| 80 | LLGA | L & L GARNETT CONSTRUCTION | | | SCAC4 |
| 81 | LLGB | L T A LOGISTICS INC | | | SCAC4 |
| 82 | LLGF | LOREALL LOGISTICS INC | | | SCAC4 |
| 83 | LLGJ | LINEAR LOGISTICS LLC | | | SCAC4 |
| 84 | LLGL | LIGHTNING LOGISTICS LLC | | | SCAC4 |
| 85 | LLGN | L & L GARDENS INC | | | SCAC4 |
| 86 | LLGP | LEADER LOGISTICS GROUP | | | SCAC4 |
| 87 | LLGQ | LOTUS LOGISTICS LLC | | | SCAC4 |
| 88 | LLGR | LIGHTNING LOGISTICS LLC | | | SCAC4 |
| 89 | LLGS | LIBERTY LOGISTICS SERVICES INC | | | SCAC4 |
| 90 | LLGW | LIS LOGISTIC GLOBAL INC | | | SCAC4 |
| 91 | LLH | Airport Handling | | UA | AVCODES |
| 92 | LLHH | LAEISZ, F SCHIFFAHRTSGESELLSCHAFT M | | | SCAC3 |
| 93 | LLHK | LEWIS, LEE H TRUCKING | | | SCAC3 |
| 94 | LLHL | LAUGHLINS LONG HAUL LTD | | | SCAC3 |
| 95 | LLHL | LIBERTY LINEHAUL WEST INC | | | SCAC4 |
| 96 | LLHT | LITTLE HARBOR TRANSPORTATION INC | | | SCAC3 |
| 97 | LLHT | LITTLE LAHAVE TRAWLERS | | | SCAC4 |
| 98 | LLI | Small Planet Airlines Italia | IATA: P2, Callsign: Auriga, Operating Licence suspended by Italian Civil Aviation Authority (ENAC) on 20 January 2014. | I | AVCODES |
| 99 | LLIA | LOGOS LOGISTIC INC | | | SCAC4 |
| 100 | LLIB | LAURA LOGISTICS INC | | | SCAC4 |
