| 1 | LAS | Compania Aerea Lineas Ecuatoguineanas de Aviacion S.A. (LEASA) | Callsign: Leasa, | GQ | AVCODES |
| 2 | LAS | Ligne Aérienne Seychelles | IATA: JG, | SY | AVCODES |
| 3 | LAS | Skymedia AG | Callsign: Lions Helicopter, Name changed to Lions Air Skymedia AG d/b/a Skymedia. ICAO designator changed from RBL | CH | AVCODES |
| 4 | LAS | Lions Air Skymedia AG d/b/a Skymedia | Callsign: Lions Helicopter, Name changed from Skymedia AG. ICAO designator changed from RBL | CH | AVCODES |
| 5 | LAS | Louisiana Southern R.R. | added 4/2008 | | NAKINA |
| 6 | LAS | LOUISIANA SOUTHERN RAILROAD | | | PWRC |
| 7 | LAS | LOUISIANA SOUTHERN RAILROAD | | | SCAC4 |
| 8 | LASA | LINEAS AGROMAR S A | | | SCAC3 |
| 9 | LASB | Lackawaxen and Stourbridge R.R. Corp. | eliminated 1/1990 | | NAKINA |
| 10 | LASB | Lackawaxen and Stourbridge R.R. Corp. (transferred to New York, Susquehanna and Western Ry. Corp.) | added 10/1988 | | NAKINA |
| 11 | LASB | Lackawaxen and Stourbridge R.R. Corp. | added 7/1976; 1/1980; eliminated 10/1988 | | NAKINA |
| 12 | LASB | Lackawaxen and Stourbridge R.R. Corp. | added 7/76; 1/80; eliminated 10/88 | | NRHS |
| 13 | LASB | Lackawaxen and Stourbridge R.R. Corp. (transferred to New York, Susquehanna and Western Ry. Corp.) | added 10/88 | | NRHS |
| 14 | LASB | Lackawaxen and Stourbridge R.R. Corp. | eliminated 1/90 | | NRHS |
| 15 | LASB | LACKAWAXEN & STOURBRIDGE RAILROAD CORP. | | | PWRC |
| 16 | LASB | Lackawaxen and Stourbridge Railroad | | | RSRV |
| 17 | LASC | LASCARI, S V AND SONS INC | | | SCAC3 |
| 18 | LASCH | Lasch GmbH Zwickau | | DE | VKM |
| 19 | LASD | LASER EXPEDITE & LOGISTICS INC | | | SCAC4 |
| 20 | LASE | LANDERS SERVICE INC | | | SCAC3 |
| 21 | LASF | LASALLE FREIGHT COMPANY | | | SCAC3 |
| 22 | LASG | LASERSHIP | | | SCAC4 |
| 23 | LASH | LASHAM LEASING COMPANY, INC. | | | SCAC3 |
| 24 | LASH | LOS ANGELES SUPERIOR TRANSPORTATION | | | SCAC4 |
| 25 | LASI | LASALLE TRUCKING INC | | | SCAC3 |
| 26 | LASJ | L A S LEASING INC | | | SCAC4 |
| 27 | LASM | LOS ANGELES-SEATTLE MTR | | | PWRC |
| 28 | LASN | LASATER, WILLIAM MOTOR LINES | | | SCAC3 |
| 29 | LASO | LENGNER & SONS PRODUCE EXPRESS | | | SCAC3 |
| 30 | LASPEZ | ATC La Spezia | City: La Spezia | I | TRAFFIC |
| 31 | LASQ | LA SALLE CARTAGE COMPANY INC | | | SCAC3 |
| 32 | LASR | LASHAM-REVERE MOTOR SERVICE, INC | | | SCAC3 |
| 33 | LASS | LAWSON BROS | | | SCAC3 |
| 34 | LAST | LA SALLE TRUCKING COMPANY | | | SCAC3 |
| 35 | LASU | SOCOMAT SAS | | F | BIC |
| 36 | LASU | SOCOMAT | | | SCAC4 |
| 37 | LASV | LAS VEGAS TRUCK LINE, INC | | | SCAC3 |
| 38 | LASW | LASHWAY, LEO E TRUCKING CO | | | SCAC3 |
| 39 | LASW | LAND AIR & SEA WORLDWIDE | | | SCAC4 |
| 40 | LASX | Lutz & Schramm, Inc. | 4/1938-10/1957; eliminated 4/1960 | | NAKINA |
| 41 | LASX | Lutz & Schramm Co. | 7/1923-7/1937 | | NAKINA |
| 42 | LASX | Lutz & Schramm, Inc. | 4/38-10/57 | | NRHS |
| 43 | LASX | LUTZ 7 schramm co. | | | PWRC |
| 44 | LASY | LASLEY TRUCKING COMPANY INC | | | SCAC3 |