| 1 | ERN | Eastern Airlines | Callsign: Eastern Airco, | MGL | AVCODES |
| 2 | ERN | Aerolinair | Callsign: Blue Hawk, Ceased operations. | F | AVCODES |
| 3 | ERN | Ernest S.r.l. | IATA: EG, Callsign: Ernest, AOC granted Novmeber 2016. Suspended operations on 11 January 2020. | I | AVCODES |
| 4 | ERNC | ERNCO TRANSPORTATION CORP | | | SCAC3 |
| 5 | ERNC | EXPRESS RUN LLC | | | SCAC4 |
| 6 | ERND | ERRANDS | | | SCAC3 |
| 7 | ERNEF | ERNEFA GmbH | | DE | VKM |
| 8 | ERNH | ERNST, HAROLD | | | SCAC3 |
| 9 | ERNI | ERNIES PRINTERS DELIVERY SERVICE, I | | | SCAC3 |
| 10 | ERNI | EMPIRE RECYCLING NY INC | | | SCAC4 |
| 11 | ERNJ | ERNIE J TRANSPORTATION | | | SCAC4 |
| 12 | ERNO | ERNESTOS | | | SCAC4 |
| 13 | ERNP | EASTERN TRANSPORT INC | | | SCAC3 |
| 14 | ERNQ | ERNIE WAMPLER DELIVERY SERVICE | | | SCAC3 |
| 15 | ERNR | ERNST, WILLIAM R | | | SCAC3 |
| 16 | ERNS | ERNST TRUCKING&WAREHOUSING, Tobic, INC | | | SCAC3 |
| 17 | ERNT | ERNST TRANSFER COMPANY | | | SCAC3 |
| 18 | ERNU | WIHELM ERNST GMBH | | D | BIC |
