| 1 | PWA | Priester Aviation | Callsign: Priester, | USA | AVCODES |
| 2 | PWA | Pacific Western Airlines | IATA: PW, Callsign: Pacific Western, ICAO callsign changed to Pac West | CDN | AVCODES |
| 3 | PWA | Pacific Western Airlines | IATA: PW, Callsign: Pac West, Bought CP Air and merged to form Canadian Airlines International. ICAO callsign changed from Pacific Western | CDN | AVCODES |
| 4 | PWA | Priester Aviation | | | ICAO1 |
| 5 | PWAB | PARKWAY AUTO BROKERS INC | | | SCAC3 |
| 6 | PWAC | PARKER, WILLIAM ASSOCIATES INC | | | SCAC3 |
| 7 | PWAF | PARKVIEW COLONY FARMS LTD | | | SCAC4 |
| 8 | PWAH | PREMIER WAREHOUSING | | | SCAC4 |
| 9 | PWAI | PACIFIC WESTERN AIRMOTIVE INC | | | SCAC3 |
| 10 | PWAL | POWELL, A L COMPANIES INC | | | SCAC4 |
| 11 | PWALB | PKS Wałbrzych | | PL | TRAFFIC |
| 12 | PWALCZ | PKS Sp. z o.o. Wałcz | | PL | TRAFFIC |
| 13 | PWAO | PAC WEST AUCTIONS | | | SCAC3 |
| 14 | PWAO | POWER TWO THOUSAND (2000) TRANSPORT | | | SCAC4 |
| 15 | PWAQ | PORKWAY FARMS LTD | | | SCAC4 |
| 16 | PWAR | POSTON WAREHOUSES INC | | | SCAC3 |
| 17 | PWAR | PWA CROPPS INC | | | SCAC4 |
| 18 | PWAT | POWELL, A L TRUCKING INC | | | SCAC3 |
| 19 | PWAT | PORT WATCH TRANSPORTATION INC | | | SCAC4 |
| 20 | PWAY | PENN WAY EXPRESS INC | | | SCAC3 |
| 21 | PWAY | PENNWAY EXPRESS INC | | | SCAC4 |
