| 1 | PRO | Propair, Inc. | Callsign: Propair, | CDN | AVCODES |
| 2 | PRO | Propair, Inc. | IATA: 6P, Callsign: Propair, Designator recalled by IATA | CDN | AVCODES |
| 3 | PRO | Propair | | | ICAO1 |
| 4 | PROBO | PROBO TRANS BEROUN | | CZ | TRAFFIC |
| 5 | PROC | PROCTOR EXPRESS INC | | | SCAC3 |
| 6 | PROC | PROCAN EXPRESS INC | | | SCAC4 |
| 7 | PROD | PRODUCE SUPPLY COMPANY | | | SCAC3 |
| 8 | PROD | PRODUCTORA AGRICOLA INDUSTRIAL DEL | | | SCAC4 |
| 9 | PROE | PRODUCE CARRIER | | | SCAC3 |
| 10 | PROE | PROEXI LOGISTIC SA DE CV | | | SCAC4 |
| 11 | PROF | PROTECTIVE FOOD SERVICES INC | | | SCAC3 |
| 12 | PROG | PROGRESSIVE TRANSPORTATION COMPANY | | | SCAC3 |
| 13 | PROG | PROGRESS BULK CARRIERS LTD | | | SCAC4 |
| 14 | PROH | PROUD, KEITH E, MOVING & STORAGE IN | | | SCAC3 |
| 15 | PROI | PERONTI TRUCKING CO INC | | | SCAC3 |
| 16 | PROK | PRO EXPRESS INC | | | SCAC3 |
| 17 | PROL | PENROD, LARRY TRUCKING | | | SCAC3 |
| 18 | PROL | PRO LOGISTICS INC | | | SCAC4 |
| 19 | PROM | PROMPT MOTOR LINES, INC | | | SCAC3 |
| 20 | PROM | PROMET Sp. z o.o. | | PL | VKM |
| 21 | PRON | PRO TRANSIT INC | | | SCAC3 |
| 22 | PRON | PRO-MEX | | | SCAC4 |
| 23 | PROO | PRO EXPRESS, Pro Express, INC | | | SCAC3 |
| 24 | PROP | PROCOPIO BROTHERS TRUCKING COMPANY | | | SCAC3 |
| 25 | PROQ | PRONTO DELIVERY SERVICE | | | SCAC3 |
| 26 | PROQ | PRO-TRAINER INC | | | SCAC4 |
| 27 | PROR | PRODUCERS SERVICE INC | | | SCAC3 |
| 28 | PROR | PROFICIENT TRANSPORT INCORPORATED | | | SCAC4 |
| 29 | PROS | PROTOS SHIPPING, INC. | | | SCAC3 |
| 30 | PROSE | PROSE AG | | CH | VKM |
| 31 | PROT | PRO TRANSPORT INC | | | SCAC3 |
| 32 | PROT | Protor sp. z o.o. sp. k. | | PL | TRAFFIC |
| 33 | PROT | PROTOR S.A. | | PL | VKM |
| 34 | PROU | PRO-TRANS A/S | | DK | BIC |
| 35 | PROV | PROVOST BULK TRANSPORT INC | | | SCAC3 |
| 36 | PROV | PROVIDER EXPRESS LTD | | | SCAC4 |
| 37 | PROV | Chemins de fer de Provence | Real: CP | F | TRAFFIC |
| 38 | PROW | PRO WEST CARTAGE TRANSPORT | | | SCAC3 |
| 39 | PROX | Procor Ltd. | added 1/1974; 1/1975-7/2005 | | NAKINA |
| 40 | PROX | Procor Ltd. | added 1/74; 1/75-7/2000 | | NRHS |
| 41 | PROX | PROCOR LTD. | | | PWRC |
| 42 | PROX | PROCOR LIMITED | | | PWRC |
| 43 | PROX | Procor | | | RSRV |
| 44 | PROX | PROCOR LIMITED | | | SCAC4 |
| 45 | PROX | Procor Ltd. | | USA | TRAFFIC |
| 46 | PROY | PRO-TRANS | | | SCAC3 |
