| 1 | UNF | Union Flights | Callsign: Union Flights, | USA | AVCODES |
| 2 | UNF | Union Flights | | | ICAO1 |
| 3 | UNFA | UNKNOWN FOREIGN AIR CARRIER | | | SCAC1 |
| 4 | UNFC | UNIVERSAL FOODS CORPORATION | | | SCAC1 |
| 5 | UNFC | UNION AFRICA LINE | | | SCAC4 |
| 6 | UNFE | UNI-FAB ENCLOSURES | | | SCAC4 |
| 7 | UNFF | UNITED TRAFFIC SERVICES INC | | | SCAC4 |
| 8 | UNFN | UNITED INTERMODE INC | | | SCAC4 |
| 9 | UNFO | UNITED FOODS INC (FREEZER QUEEN FOO | | | SCAC4 |
| 10 | UNFQ | UNFI | | | SCAC4 |
| 11 | UNFU | UNIFEEDER FZCO | | UAE | BIC |
| 12 | UNFW | UNION FREIGHTWAYS | | | SCAC4 |
| 13 | UNFX | American Railcar Industries | added 10/2006 | | NAKINA |
| 14 | UNFX | AMERICAN RAILCAR INDUSTRIES | | | PWRC |
| 15 | UNFX | AMERICAN RAILCAR INDUSTRIES | | | SCAC4 |
