| 1 | PAI | Paradise Airways, Inc. | Callsign: Sea Ray, | USA | AVCODES |
| 2 | PAI | Piedmont Airlines, Inc. | IATA: PI, Callsign: Piedmont, Merged into UsAir | USA | AVCODES |
| 3 | PAI | Paradise Airways | | | ICAO1 |
| 4 | PAIA | PAMPLIN, GARY TRUCKING | | | SCAC3 |
| 5 | PAIA | PUEBLO AMIGO IMPORT | | | SCAC4 |
| 6 | PAIB | PACIFIC | | | SCAC4 |
| 7 | PAIC | PACIFIC INLAND TRANSPORT INC | | | SCAC3 |
| 8 | PAID | PAINE, DENNIS SERVICE CO | | | SCAC3 |
| 9 | PAID | PACIFIC ATLANTIC LINE (ISRAEL) LTD | | | SCAC4 |
| 10 | PAIE | PAM'S, THE DELIVERY SERVICE | | | SCAC3 |
| 11 | PAIE | PAMS, THE DELIVERY SERVICE | | | SCAC4 |
| 12 | PAIF | PILOT AIR FREIGHT | | | SCAC4 |
| 13 | PAII | PAN AM INT'L INC | | | SCAC3 |
| 14 | PAIK | PAI TRUCKING | | | SCAC4 |
| 15 | PAIL | PACIFIC INLAND NAVIGATION CO INC, | | | SCAC3 |
| 16 | PAIL | PATTERSON INDUSTRIES (CANADA) LIMIT | | | SCAC4 |
| 17 | PAIM | PACIFIC INTERMODAL TRANSPORT INC | | | SCAC3 |
| 18 | PAIN | PAINE-WOODFIN EXPRESS CO, INC | | | SCAC3 |
| 19 | PAIP | PRO AMERICA INC | | | SCAC4 |
| 20 | PAIQ | PAILLE EXPRESS INC | | | SCAC3 |
| 21 | PAIS | PAISLEY TRUCKING INC | | | SCAC3 |
| 22 | PAIS | PAISLEY TRUCKING INC | | | SCAC4 |
| 23 | PAIV | PACITTI, STEVE INC | | | SCAC4 |
| 24 | PAIX | Pol-Tex International, Division of Poly-America | added 10/2001; 7/2005; eliminated 4/2006 | | NAKINA |
| 25 | PAIX | Poly-America, Inc. | added 1/1991; 1/1994; eliminated 4/1994; 7/2000 (not listed) | | NAKINA |
| 26 | PAIX | Poly-America, Inc. | added 1/91; 1/94; eliminated 4/94; 7/2000 | | NRHS |
| 27 | PAIX | POL-TEX INTERNATIONAL, DIV. POLY-AMERICA, INC. | | | PWRC |
| 28 | PAIX | Pol-Tex Internation Division of Poly-America | | | RSRV |
| 29 | PAIX | POLY-AMERICA, INC | | | SCAC4 |
