| 1 | YP | Aero Lloyd Flugreisen GmbH & Co. | ICAO: AEF, Callsign: Aero Lloyd, Ceased operations on 16 October 2003. IATA designator changed from LL | D | AVCODES |
| 2 | YP | Air Premia Inc. | ICAO: APZ, Callsign: Air Premia, IATA Prefix: 350, Due to commence operations in 2H20 with 3 x Boeing 787-9. Founded on 27 July 2017. | ROK | AVCODES |
| 3 | YPA | Yugoslav People's Army | | YU | TRAFFIC |
| 4 | YPCC | Y P C CONTRACTEUR FORESTIER INC | | | SCAC4 |
| 5 | YPCI | YOUNG, PAM & COMPANY INC | | | SCAC4 |
| 6 | YPDS | YOUR P D & S AGENT INC | | | SCAC4 |
| 7 | YPPO | YOUNG PETROLEUM PRODUCTS | | | SCAC4 |
| 8 | YPRU | SITRA | | B | BIC |
| 9 | YPRU | SITRA | | | SCAC4 |
| 10 | YPRY | Yapiray Demiryolu IngŞaat Sistemleri San. Ve. Tic. A.Ş. | | TR | VKM |
| 11 | YPZE | YEPIZ EXPRESS | | | SCAC4 |
