| 1 | PSA | Pacific Island Aviation, Inc. | IATA: 9J, Callsign: Pacific Isle, IATA Prefix: 321, Founded in 1997. Commenced operations in August 1988. Ceased operations on 09 February 2005. | MP | AVCODES |
| 2 | PSA | Pacific Island Aviation | | | ICAO1 |
| 3 | PSAB | PACIFIC SCIENTIFIC TRANSPORT | | | SCAC4 |
| 4 | PSAC | P S ASSOCIATES INCORPORATED | | | SCAC3 |
| 5 | PSAD | PORTILLO & SONS TRANSPORTATION | | | SCAC4 |
| 6 | PSAF | PREMIER CARRIERS | | | SCAC4 |
| 7 | PSAG | PENINSULAR SHIP AGENCIES INC. | | | SCAC3 |
| 8 | PSAH | PETRO SOURCE TRANSPORTATION LLC | | | SCAC4 |
| 9 | PSAI | POWER STAR ASSOCIATES | | | SCAC4 |
| 10 | PSAL | PETROLEUM SALES | | | SCAC3 |
| 11 | PSAP | The Puget Sound & Pacific R.R. Co. | 7/2000-7/2005 | | NAKINA |
| 12 | PSAP | The Puget Sound & Pacific R.R. Co. | Jul-00 | | NRHS |
| 13 | PSAP | PUGET SOUND & PACIFIC RAILROAD | | | PWRC |
| 14 | PSAP | Puget Sound and Pacific Railroad | | | RSRV |
| 15 | PSAP | PUGET SOUND & PACIFIC RAILROAD COMP | | | SCAC4 |
| 16 | PSAS | POSTA, A TRANSFER INC | | | SCAC4 |
| 17 | PSAT | PALMETTO STATE TRANSPORTATION CO | | | SCAC3 |
| 18 | PSAV | PACHECO SERVICES LLC | | | SCAC4 |
| 19 | PSAW | PETROPUMA SA | | | SCAC4 |
| 20 | PSAZ | PACIFIC NORTHWEST PERISHABLE SHIPPERS ASSN.,INC. | | | PWRC |
| 21 | PSAZ | Pacific Northwest Perishable Shippers Association | | | RSRV |
| 22 | PSAZ | PACIFIC NORTHWEST PERISHABLE SHIPPE | | | SCAC4 |
