| 1 | YFS | Young Flying Service | Callsign: Young Air, | USA | AVCODES |
| 2 | YFS | Young Flying Service | | | ICAO1 |
| 3 | YFSA | YONKE FENIX SA DE CV | | | SCAC4 |
| 4 | YFSL | YEADON FABRIC STRUCTURES LIMITED | | | SCAC4 |
| 5 | YFSO | YELLOW FREIGHT SYSTEM OF ONTARIO, INC | | | SCAC1 |
| 6 | YFSY | YELLOW FREIGHT SYSTEM, INC. | | | PWRC |
| 7 | YFSY | YELLOW FREIGHT SYSTEM, INC | | | SCAC1 |
| 8 | YFSY | Yellow Transportation | | | SCAC2 |
| 9 | YFSY | YRC INC | | | SCAC4 |
| 10 | YFSZ | YELLOW FREIGHT SERVICES, INC. | | | PWRC |
| 11 | YFSZ | Yellow Freight Services | | | RSRV |
| 12 | YFSZ | YELLOW FREIGHT SYSTEM, INC. | | | SCAC4 |
