| 1 | ECA | Eurocypria Airlines Ltd. | IATA: UI, Callsign: Eurocypria, IATA Prefix: 475, Liquidated on 29 November 2010 after EU failed to approve merger with Cyprus Airways | CY | AVCODES |
| 2 | ECA | Eagle Commuter Airlines | Callsign: Eagleair, | USA | AVCODES |
| 3 | ECA | OHL Air Charterflug GmbH & Co. KG | Callsign: Dark Knight, Name changed to Excellent Air GmbH. | D | AVCODES |
| 4 | ECA | Excellent Air GmbH | Callsign: Dark Knight, Name changed from OHL Air Charterflug GmbH & Co. KG. | D | AVCODES |
| 5 | ECA | Eurocypria Airlines | IATA: UI | | ICAO1 |
| 6 | ECA | Eisenbahnclub Aschersleben e.V. | Aschersleben | D | privat-bahn.de |
| 7 | ECAA | EXPRESS FUELS INC | | | SCAC4 |
| 8 | ECAD | ENTERPRISE CRUDE OIL LLC | | | SCAC4 |
| 9 | ECAE | EYE CARE ALLIANCE LLC | | | SCAC4 |
| 10 | ECAG | EAST COAST AUTO LOGISTICS LLC | | | SCAC4 |
| 11 | ECAI | EMERALD COAST AIR FREIGHT | | | SCAC3 |
| 12 | ECAJ | ECOTURISTICA | | | SCAC4 |
| 13 | ECAM | ECAM CONTAINER AGENCIES INC | | | SCAC3 |
| 14 | ECAO | ELM CITY AUTO REPAIR LLC | | | SCAC4 |
| 15 | ECAR | ECONOMY CARRIERS LIMITED | | | SCAC3 |
| 16 | ECAR | ECL TRANSPORTATION LTD | | | SCAC4 |
| 17 | ECAU | ENERCON GMBH | | D | BIC |
| 18 | ECAU | ENERCON GMBH | | | SCAC4 |
| 19 | ECAU | ELETRIC Schaltanlagenfertigung GmbH | | DE | VKM |
