| 1 | PPL | Pluto Airlines LLC | IATA: PD, Callsign: Pluto Air, Ceased Operations | UAE | AVCODES |
| 2 | PPL | Air Pegasus Pvt. Ltd. | IATA: OP, Callsign: Pegasus, Founded in 2014. Commenced operations on 12 April 2015. Ceased operations on 27 July 2016. | IND | AVCODES |
| 3 | PPLA | PIERPOINT TRANS LINE INC | | | SCAC4 |
| 4 | PPLB | PRECISION PALLET LLC | | | SCAC4 |
| 5 | PPLC | PHILLIPS PIPE LINE COMPANY | | | SCAC3 |
| 6 | PPLD | PRODUCER'S PETROLEUM LLC | | | SCAC4 |
| 7 | PPLE | PRAIRIE PIRATES LTD | | | SCAC4 |
| 8 | PPLJ | PAPPAS LOGISTICS INC | | | SCAC4 |
| 9 | PPLL | PURPLE LINE HOLDING S A | | | SCAC3 |
| 10 | PPLL | PIONEER PALLET & LUMBER LTD | | | SCAC4 |
| 11 | PPLO | PEOPLES OIL | | | SCAC4 |
| 12 | PPLOCK | Przedsiębiorstwo Komunikacji Samochodowej w Płocku | | PL | TRAFFIC |
| 13 | PPLP | PINNACLE PROPANE LLC | | | SCAC4 |
| 14 | PPLQ | PHANEUF, PIERRE LUC (PLP) INC | | | SCAC4 |
| 15 | PPLR | POPLAR SCHOOLS | | | SCAC3 |
| 16 | PPLS | PRIDE PLUS TRANSPORTATION | | | SCAC4 |
| 17 | PPLT | PEOPLES TRANSPORT | | | SCAC3 |
| 18 | PPLU | BERTSCHI AG | | CH | BIC |
| 19 | PPLU | PER PLUS LOGISTICS B V | | | SCAC4 |
| 20 | PPLV | PEREGRINE POINT LLC | | | SCAC4 |
| 21 | PPLX | Pennsylvania Power & Light Co. | added 10/1964; 7/1965-7/2005 | | NAKINA |
| 22 | PPLX | Pierce Pipe Line Co. (Pierce Petroleum Corp.) | 7/1930 | | NAKINA |
| 23 | PPLX | Pennsylvania Power & Light Co. | 7/65-7/2000 | | NRHS |
| 24 | PPLX | *PIERCE PETROLEUM CORP. [PIERCE PIPE LINE CO.] | | | PWRC |
| 25 | PPLX | +PENNSYLVANIA POWER & LIGHT CO. | | | PWRC |
| 26 | PPLX | Pennsylvania Power and Light | | | RSRV |
| 27 | PPLX | PENNSYLVANIA POWER & LIGHT CO | | | SCAC3 |
| 28 | PPLX | Pennsylvania Power & Light Co. | | USA | TRAFFIC |
| 29 | PPLZ | PENNSYLVANIA POWER & LIGHT CO. | | | PWRC |
