| 1 | PD | Pemair | ICAO: PEM, Callsign: Pem-Air, | CDN | AVCODES |
| 2 | PD | Pluto Airlines LLC | ICAO: PPL, Callsign: Pluto Air, Ceased Operations | UAE | AVCODES |
| 3 | PD | Palau Rock Island Air | | PAL | AVCODES |
| 4 | PD | Porter Airlines Inc. | ICAO: POE, IATA Designator changed to P3. | CDN | AVCODES |
| 5 | PD | Porter Airlines (Canada) Limited | | CDN | AVCODES |
| 6 | PDA | Podilia-Avia | Callsign: Podilia, | UA | AVCODES |
| 7 | PDA | Podilia-Avia | | | ICAO1 |
| 8 | PDAC | P D A CORPORATION | | | SCAC3 |
| 9 | PDAC | PADDA CARRIERS INC | | | SCAC4 |
| 10 | PDAH | PLUMLEY DELIVERY SERVICE LLC | | | SCAC4 |
| 11 | PDAI | PDA INTERNATIONAL | | | SCAC3 |
| 12 | PDAI | PRODUITS ANDALOS INC | | | SCAC4 |
| 13 | PDAJ | PANCHOS DISTRIBUTING CO INC | | | SCAC4 |
| 14 | PDAL | PALADINO, VINCE FARMS INC | | | SCAC4 |
| 15 | PDAM | PLRS DE ACUNA S RL DE | | | SCAC4 |
| 16 | PDAP | PARADA SHIPPING COMPANY LIMITED | | | SCAC3 |
| 17 | PDAS | PANDAS DELIVERY | | | SCAC3 |
| 18 | PDAS | PRODUCTION DESIGN INTERNATIONAL INC | | | SCAC4 |
| 19 | PDAT | PANDA TRUCKING INC | | | SCAC4 |
| 20 | PDAU | DALIAN JIFA BOHAI RIM CONTAINER LINES | | PRC | BIC |
| 21 | PDAV | PORTER, DAVID | | | SCAC4 |
| 22 | PDAX | Protex Industries, Inc. | added 10/1964; 7/1965-1/1975; eliminated 4/1978 | | NAKINA |
| 23 | PDAX | Protex Industries, Inc. | 7/65-1/75; eliminated 4/78 | | NRHS |
| 24 | PDAX | PROTEX INDUSTRIES, INC. | | | PWRC |
| 25 | PDAX | PROTEX INDUSTRIES INC | | | SCAC3 |
| 26 | PDAY | PARDUE, DANNY | | | SCAC4 |
| 27 | PDBC | PIONEER DISTRIBUTING INC | | | SCAC4 |
| 28 | PDBQ | PACIFIC DELECTABLES INC | | | SCAC4 |
| 29 | PDBS | PAPER DISTRIBUTION SERVICES INC | | | SCAC3 |
| 30 | PDBS | PASHA DISTRIBUTION SERVICES | | | SCAC4 |
| 31 | PDBT | PRESTON DOBBS TRUCK SERVICE | | | SCAC3 |
| 32 | PDBV | PARADISE BEVERAGES INC | | | SCAC4 |
| 33 | PDC | Potomac Air, Inc. | IATA: BK, Callsign: District, IATA Prefix: 522, Formed out of merger of United Air Lines and US Airways | USA | AVCODES |
| 34 | PDC | Potomac Air | IATA: BK | | ICAO1 |
| 35 | PDC | PINNEY DOCK CO. | | | PWRC |
| 36 | PDCB | PACIFIC DAIRY CENTRE LTD | | | SCAC4 |
| 37 | PDCE | PACKAGE DELIVERY COMPANY | | | SCAC4 |
| 38 | PDCH | PDC GLASS OF MICHIGAN INC | | | SCAC4 |
| 39 | PDCI | PREFERRED CARRIERS INC | | | SCAC4 |
| 40 | PDCL | PETREDEC LTD., HAMILTON, BERMUDA | | | SCAC3 |
| 41 | PDCL | PETREDEC LTD BERMUDA | | | SCAC4 |
| 42 | PDCM | PHELPS DODGE CORP. (MORENCI BRANCH) | | | PWRC |
| 43 | PDCM | PRODUCT DISTRIBUTION COMPANY | | | SCAC3 |
| 44 | PDCN | PHELPS DODGE CORP. (NEW CORNELIA MINE, AJO, AZ) | | | PWRC |
| 45 | PDCO | PORT DISTRIBUTING CORP | | | SCAC3 |
| 46 | PDCP | PARADICE CONTAINER PORT (DIV THOMAS | | | SCAC3 |
| 47 | PDCQ | PAS POINT DRAYAGE CO | | | SCAC3 |
| 48 | PDCQ | PADILLA, CESAR | | | SCAC4 |
| 49 | PDCR | PADENA CORP | | | SCAC3 |
| 50 | PDCR | PRADON CONSTRUCTION & TRUCKING CO I | | | SCAC4 |
| 51 | PDCS | PEDASTA s.r.o. | | CZ | VKM |
| 52 | PDCT | PDC TRUCKING COMPANY & SHENANDOAH DISTRIBUTION CENTERS | | | SCAC3 |
| 53 | PDCU | PEORIA DISPOSAL COMPANY | | | SCAC3 |
| 54 | PDCV | PRODUCTIVE TRANSPORTATION INC | | | SCAC3 |
| 55 | PDCW | PHOENIX DRILLING CORP | | | SCAC4 |
| 56 | PDCZ | PORTLAND DEVELOPMENT COMMISSION | | | PWRC |
| 57 | PDD | Phillips Alaska, Inc. | Callsign: Pada, | USA | AVCODES |
| 58 | PDD | Phillips Alaska | | | ICAO1 |
| 59 | PDDI | PARTREDDERIET IDALITH | | | SCAC3 |
| 60 | PDDK | PRESIDENTS DESK | | | SCAC4 |
| 61 | PDDL | PREFERRED DISPATCH INC | | | SCAC3 |
| 62 | PDDN | PORTEADORES DEL NOROESTE S A DE C | | | SCAC4 |
| 63 | PDDO | PACER STACTRAIN | | | SCAC4 |
| 64 | PDDQ | P D Q DELIVERY | | | SCAC3 |
| 65 | PDEA | PROPANE DIRECT ENTERPRISES LLC | | | SCAC4 |
| 66 | PDEC | PRIDE OF THE COUNTRY CARRIERS INC | | | SCAC3 |
| 67 | PDEC | PRIDE EXPRESS LIMITED LLC | | | SCAC4 |
| 68 | PDED | P D EXPRESS | | | SCAC3 |
| 69 | PDED | PDS BROKERAGE | | | SCAC4 |
| 70 | PDEF | PRIDE TRANSPORTATION INC | | | SCAC3 |
| 71 | PDEI | PROFESSIONAL DELIVERY INC | | | SCAC3 |
| 72 | PDEL | PERISHABLE DELIVERIES, INC | | | SCAC3 |
| 73 | PDEL | PERISHABLE DELIVERIES INC | | | SCAC4 |
| 74 | PDEO | PD EXPRESS | | | SCAC3 |
| 75 | PDEP | PENN-DEL EXPRESS | | | SCAC3 |
| 76 | PDEQ | PROMPT DELIVERY SERVICE | | | SCAC3 |
| 77 | PDEQ | PODOLINSKY EQUIPMENT LTD | | | SCAC4 |
| 78 | PDER | PONDER, R A TRANSPORT | | | SCAC3 |
| 79 | PDER | PEDERSEN, LEE | | | SCAC4 |
| 80 | PDET | PRIDE EXPRESS & TRANSFER CO INC | | | SCAC3 |
| 81 | PDET | PDE TRANSPORT INC | | | SCAC4 |
| 82 | PDEV | PATS DELIVERY | | | SCAC3 |
| 83 | PDF | LAR Transregional, Linhas Aerea Regionais, S.A. | IATA: TH, Designator TH recalled by IATA | P | AVCODES |
| 84 | PDF | LAR Transregional, Linhas Aerea Regionais, S.A. | Callsign: Transregional, | P | AVCODES |
| 85 | PDF | Pelican Air Services CC d/b/a Pelican Air | IATA: 7V, Callsign: Pelican Airways, Name changed to Federal Air (Pty) Ltd. Designator 7V reinstated by IATA | ZA | AVCODES |
| 86 | PDF | Pelican Air Services | | | ICAO1 |
| 87 | PDFC | PEDRONI FUEL CO | | | SCAC3 |
| 88 | PDFC | PEDRONI FUEL CO | | | SCAC4 |
| 89 | PDFD | PIEDMONT FORWARDING INC | | | SCAC4 |
| 90 | PDFF | PDQ FAST FREIGHT INC | | | SCAC3 |
| 91 | PDFI | P D FREIGHT SYSTEMS, INC | | | SCAC3 |
| 92 | PDFL | PACIFIC DENSIFIED FUELS INC | | | SCAC3 |
| 93 | PDFL | PROCESADOS DE FRUTAS Y LEGUMBRES S | | | SCAC4 |
| 94 | PDFQ | P & D FREIGHT INC | | | SCAC4 |
| 95 | PDFR | PDQ FREIGHT SYSTEMS INC | | | SCAC3 |
| 96 | PDFS | PRODUCER FREIGHT SYSTEMS | | | SCAC3 |
| 97 | PDFS | PDS FREIGHT SERVICES INC | | | SCAC4 |
| 98 | PDFT | P & D FRUIT | | | SCAC4 |
| 99 | PDG | PLM Dollar Group Limited | Callsign: Osprey, | GB | AVCODES |
| 100 | PDG | PLM Dollar Group | | | ICAO1 |
