| 1 | UAL | United Airlines, Inc. | IATA: UA, Callsign: United, IATA Prefix: 016, Name changed from United Air Lines, Inc. | USA | AVCODES |
| 2 | UAL | United Air Lines, Inc. | IATA: UA, Callsign: United, IATA Prefix: 016, Name changed to United Airlines, Inc. | USA | AVCODES |
| 3 | UAL | United Airlines | IATA: UA | | ICAO1 |
| 4 | UALC | UNIVERSAL AFRICA LINES N V (N A) | | | SCAC4 |
| 5 | UALG | UNITED AMERICAN LOGISTICS INC | | | SCAC4 |
| 6 | UALL | UA LLC | | | SCAC4 |
| 7 | UALS | UAL UNIVERSAL AFRICA LINES N V (N A | | | SCAC4 |
