| 1 | PRI | Aloha Islandair, Inc. | IATA: WP, IATA Prefix: 347, Name changed to Hawaii Island Air. Inc d/b/a Island Air w.e.f. 11 May 2004. | USA | AVCODES |
| 2 | PRI | Hawaii Island Air. Inc d/b/a Island Air | IATA Prefix: 347, Name changed from Aloha Islandair, Inc. | USA | AVCODES |
| 3 | PRI | Primera Air Scandinavia A/S | IATA: P6, Callsign: Primera, IATA Designator changed to PF | DK | AVCODES |
| 4 | PRI | Primera Air Scandinavia A/S | IATA: PF, Callsign: Primera, Ceased operations on 01 October 2018. IATA Designator changed from P6 | DK | AVCODES |
| 5 | PRI | Aerotransportes Privados | | | ICAO1 |
| 6 | PRI | Port Railroad, Inc. | added 7/1994; eliminated 7/1996 | | NAKINA |
| 7 | PRI | Port Railroad, Inc. | added 7/94; eliminated 7/96 | | NRHS |
| 8 | PRI | PORT RAILROAD, INC. | | | PWRC |
| 9 | PRIA | PRSD LOGISTICS | | | SCAC4 |
| 10 | PRIB | PRICE, LYNDON | | | SCAC3 |
| 11 | PRIC | PRICE TRUCK LINE, INC | | | SCAC3 |
| 12 | PRIE | PRICE TRANSPORTATION | | | SCAC3 |
| 13 | PRIF | PRIORITY AIR FREIGHT INC | | | SCAC3 |
| 14 | PRIF | PRITCHETTS | | | SCAC4 |
| 15 | PRIG | PRESTIGE DELIVERIES INC | | | SCAC3 |
| 16 | PRIH | PRITCHETT, MARVIN H | | | SCAC3 |
| 17 | PRIH | PRITCHETT TRUCKING INC | | | SCAC4 |
| 18 | PRII | PREMIER LIMO | | | SCAC3 |
| 19 | PRII | PRO RISING INTERNATIONAL LTD | | | SCAC4 |
| 20 | PRIJ | PRIME, INC. | | | SCAC3 |
| 21 | PRIJ | PRIME INC | | | SCAC4 |
| 22 | PRIK | PRICE TRUCKING INC | | | SCAC4 |
| 23 | PRIM | PRIME SHIPPING INTERNATIONAL INC | | | SCAC4 |
| 24 | PRIN | PRINS, WILLIAM A AND SON | | | SCAC3 |
| 25 | PRIN | PRINS, LEROY TRUCKING INC | | | SCAC4 |
| 26 | PRINCE | Prince Omnibus | | GB | TRAFFIC |
| 27 | PRINCEM | Prince Marshal | | GB | TRAFFIC |
| 28 | PRIO | PRIMO TRUCKING INC | | | SCAC3 |
| 29 | PRIP | PUERTO RICO INTERNATIONAL AIRPORT I | | | SCAC3 |
| 30 | PRIP | PR1 MOTORSPORTS INC | | | SCAC4 |
| 31 | PRIQ | PRAIRIE TRANSPORTATION INC | | | SCAC3 |
| 32 | PRIR | PRAIRIE TRANSPORT | | | SCAC4 |
| 33 | PRIU | RETIRED 05-27-93 ATP | | | PWRC |
| 34 | PRIV | PRIVITERA, SAM | | | SCAC3 |
| 35 | PRIW | PRAIRIEWOOD INC | | | SCAC3 |
| 36 | PRIX | PRO RAIL INC. | | | PWRC |
| 37 | PRIZ | PRESTON INDUSTRY | | | PWRC |
