| 1 | PIT | Panair S.p.A. | IATA: P2, Callsign: Panairfly, Name changed from Panair - Comagnia Aerea Mediterranea Srl. Name changed from Panair - Comagnia Aerea Meridiaonale Srl | I | AVCODES |
| 2 | PIT | Panair International Srl | Name changed to Panair - Comagnia Aerea Mediterranea | I | AVCODES |
| 3 | PITA | PITTS, ALAN TRUCKING | | | SCAC3 |
| 4 | PITC | PIERCETON TRUCKING COMPANY, INC | | | SCAC3 |
| 5 | PITD | PITT-OHIO EXPRESS, INC | | | SCAC3 |
| 6 | PITD | PITT-OHIO EXPRESS | | | SCAC4 |
| 7 | PITE | PIRIL INSAAT TICARET VE BILGISAYAR | | | SCAC4 |
| 8 | PITER | Piteravto LLC | | RUS | TRAFFIC |
| 9 | PITF | PITCHFORD ELEVATOR CO | | | SCAC4 |
| 10 | PITG | PITTSBURGH TRANSFER & STORAGE COMPA | | | SCAC3 |
| 11 | PITH | PIER 333 INC | | | SCAC3 |
| 12 | PITI | PITITI TRANSPORTATION | | | SCAC4 |
| 13 | PITJ | PILGRIM TRUCKING COMPANY | | | SCAC3 |
| 14 | PITJ | PILGRIM TRUCKING CO INC | | | SCAC4 |
| 15 | PITK | PIANA TRUCKING COMPANY | | | SCAC4 |
| 16 | PITL | PIPERS TRANSFER | | | SCAC3 |
| 17 | PITO | PIPELINE TRUCKING COMPANY, INC | | | SCAC3 |
| 18 | PITO | PORTLAND INTERMODAL TRANSPORT SERVI | | | SCAC4 |
| 19 | PITQ | PITT, WILLIAM CO INC | | | SCAC3 |
| 20 | PITS | PIER TRANSPORTATION INC | | | SCAC4 |
| 21 | PITT | PITT COUNTY TRANSPORTATION COMPANY, | | | SCAC3 |
| 22 | PITT | Pittsburg Coal Company | | USA | TRAFFIC |
| 23 | PITTSBURGH | | City: Pittsburgh | USA | TRAFFIC |
| 24 | PITU | PITERS AG, | | | SCAC3 |
| 25 | PITU | POLITRANSPOOL SA | | | SCAC4 |
| 26 | PITW | PIONEER TRANSFER AND WAREHOUSE COMP | | | SCAC3 |
| 27 | PITW | PIT PACIFIC INVESTMENT & TRADING GM | | | SCAC4 |
