| 1 | LON | Avilond Airline | Callsign: Avilond, Ceased operations. | UA | AVCODES |
| 2 | LON | London European Airways PLC | IATA: UQ, Callsign: European, Name changed to Ryanair Europe. | GB | AVCODES |
| 3 | LON | Ryanair Eurpoe | IATA: UQ, Callsign: European, Merged into Ryanair Ireland. Name changed from London European Airways PLC. | GB | AVCODES |
| 4 | LON | Legend of the Nile Aviation | Callsign: Misr, | ET | AVCODES |
| 5 | LONA | LONA TRUCKING CO | | | SCAC3 |
| 6 | LONB | LAKE ONTARIO BULK CARRIERS, INC. | | | SCAC3 |
| 7 | LONB | London Buslines | | GB | TRAFFIC |
| 8 | LONC | LONESTAR CEMENT | | | PWRC |
| 9 | LONC | London Country | | GB | TRAFFIC |
| 10 | LOND | LONDON EXPRESS | | | SCAC4 |
| 11 | LONE | LONE OAK INC | | | SCAC3 |
| 12 | LONE | LOAD ONE | | | SCAC4 |
| 13 | LONG | LONG TRANSPORTATION CO | | | PWRC |
| 14 | LONK | LONG, JACK | | | SCAC3 |
| 15 | LONQ | LONERGAN TRANSPORTATION INC | | | SCAC3 |
| 16 | LONR | LONG ROCK CO | | | SCAC3 |
| 17 | LONS | LONE STAR INTERMODAL INC | | | SCAC3 |
| 18 | LONSR | London Street Railway | | CDN | TRAFFIC |
| 19 | LONTR | London Transit | | CDN | TRAFFIC |
| 20 | LONU | ARXADA AG | | CH | BIC |
| 21 | LONU | LONZA LTD | | | SCAC4 |
| 22 | LONV | LONSBERRY, VERN | | | SCAC4 |
| 23 | LONZA | Lonza AG | | CH | VKM |
