| 1 | LEO | Leopair, S.A. | Callsign: Leopair, | CH | AVCODES |
| 2 | LEO | Lion Air (Pvt) Ltd. | Callsign: Sri-Lion, ICAO Designator changed from LNS | CL | AVCODES |
| 3 | LEO | Sunair Air One S.L. | Callsign: Sun-Ole, | E | AVCODES |
| 4 | LEOB | LEONARD BROS MOVING & STORAGE CO | | | SCAC3 |
| 5 | LEOC | LEONE CORPORATION, THE | | | SCAC3 |
| 6 | LEOC | LEO TRUCKING INC | | | SCAC4 |
| 7 | LEOE | LEOS TRUCKING | | | SCAC3 |
| 8 | LEOE | LEON TRANSPORT | | | SCAC4 |
| 9 | LEOG | LOYD, ERIC O TRUCKING | | | SCAC4 |
| 10 | LEOH | LEONHARDT TRUCKING, INC | | | SCAC3 |
| 11 | LEOI | LEO TANK LINES INC | | | SCAC3 |
| 12 | LEOK | LEOS TRUCKING | | | SCAC3 |
| 13 | LEOK | LEO TANKER CORPORATION | | | SCAC4 |
| 14 | LEOL | LEONARDO TRUCK LINES INC | | | SCAC3 |
| 15 | LEOL | LEO LOGISTICS INC | | | SCAC4 |
| 16 | LEOM | LEE OIL COMPANY INC | | | SCAC4 |
| 17 | LEON | LEONI MOTOR EXPRESS, INC | | | SCAC3 |
| 18 | LEOP | LEOPOLD, MARVIN | | | SCAC3 |
| 19 | LEOQ | LEOMINSTER TRANSPORTATION INC | | | SCAC3 |
| 20 | LEOR | LEONHARDT BROS TRANSFER | | | SCAC3 |
| 21 | LEOS | LEONARD, L J EXPRESS | | | SCAC4 |
| 22 | LEOV | LIGHTHOUSE EXPRESS ONE INC | | | SCAC4 |
| 23 | LEOW | LEONARD STORAGE & WAREHOUSE COMPANY | | | SCAC3 |
| 24 | LEOX | Golden Foods, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 25 | LEOX | Louisville Edible Oil Products, Inc. | added 1/1990; eliminated 7/1992; 1/1994 (not listed) | | NAKINA |
| 26 | LEOX | Louisville Vegetable Oil Supply Co., Inc. | added 4/1986; eliminated 1/1990 | | NAKINA |
| 27 | LEOX | Louisville Edible Oil Products, Inc. | eliminated 4/1986 | | NAKINA |
| 28 | LEOX | Louisville Edible Oil Products, Inc. | eliminated 4/86 | | NRHS |
| 29 | LEOX | Louisville Vegetable Oil Supply Co., Inc. | added 4/86; eliminated 1/90 | | NRHS |
| 30 | LEOX | Louisville Edible Oil Products, Inc. | added 1/90; eliminated 7/92 | | NRHS |
| 31 | LEOX | Louisville Vegetable Oil Supply Co., Inc. | Jan-94 | | NRHS |
| 32 | LEOX | Golden Foods, Inc. | Jul-00 | | NRHS |
| 33 | LEOX | GOLDEN FOODS INCORPORATED [LOUISVILLE EDIBLE OIL PRODUCTS, INC.] | | | PWRC |
| 34 | LEOX | Louisville Edible Oil Products (Golden Foods) | | | RSRV |
| 35 | LEOX | GOLDEN FOODS, INC. | | | SCAC4 |