| Omnitrans Inc. | Tout Entreprises et services | omnitrans.com |
| One Spa Retreat Montreal | Aromatherapy | — |
| Opsis Services Aéroportuaires Inc | Airports | — |
| P Za | za | — |
| Paprima Industries Inc. | Tout Entreprises et services | paprima.ca |
| Park'n Fly | Airport Parking | parknfly.ca |
| Parker-Hannifin Canada | Tout Entreprises et services | parker.com |
| Performance Transmission | Transmission Repair | — |
| Pestroy Chemical Co Inc | Chemicals | — |
| Pharmacie Les Jardins Dorval | Pharmacy | — |
| Pharmacie Mina Mikhail Inc | Pharmacy | pharmacydorval.com |
| Physio Dorval | Physiotherapy | — |
| PIECE D’AUTO DORVAL Inc. | Automobiles | — |
| Pizza M | Pizza & Pizzerias | — |
| Pizzeria Des Sources | Pizza & Pizzerias | — |
| Pièces d'Auto Dorval (1989) | Auto Part Manufacturers & Wholesalers | dorvalautoparts.com |
| Planchers Bois Franc Golden Elite | Tout Entreprises et services | goldenelitedeco.com |
| Planterra Inc. | Tout Commerces au détail | planterra.ca |
| Planterra Ltée | Christmas Trees | — |
| Planterra Ltée | Christmas Trees | planterra.ca |
| Plaza Dorval | Apartment Hotels | plazadorval.ca |
| PME MTL | Tout Entreprises et services | pmemtl.com |
| Pneus Du Source | Tire Shop | — |
| Pneus Rallye Ltée | Tire Shop | napaautopro.com |
| Pneus Unik | Tire Shop | pneuunik.com |
| PO-Labs | Life Sciences and Health Technologies (LSHT) | po-labs.com |
| POLVIGÉ TECHNOLOGIES INC. | Aerospace | polvige.com |
| Porter Airlines | Airline Ticket Agencies | — |
| Porter Airlines | Airlines | — |
| Porter Airlines | Airlines | — |
| Premiere Executive Suites | Apartment Hotels, Tout Entreprises et services | premieresuites.com |
| Presstine Marketing Inc | Collectibles | presstinemarketing.com |
| Prestige Generatrices Inc | Generators | — |
| Primax Technologies | Battery Chargers | primax.ca |
| Primeau Elise Dr | Chiropractors | — |
| Procolor Collision | Auto Body Shop | — |
| Procolor Collision 20 West | Auto Body Shop | — |
| Produits Métalliques Bailey Ltée | Tout Entreprises et services | bmp-group.com |
| Propair Inc | Aircraft & Private Jet Charter, Tout Entreprises et services | propair.ca |
| Provincial Airlines | Aircraft & Private Jet Charter | — |
| Provincial Airlines | Aircraft & Private Jet Charter | — |
| Provincial Airlines | Airlines | — |
| Provincial Airlines | Airlines | — |
| Quality Inn | Apartment Hotels | choicehotels.ca |
| Radiateurs Dorval Ltée | Car Repair | radiateursdorval.com |
| Rafik Mankarios - Orchestres événem... | Tout Arts et divertissement, Tout Entreprises et services | rafikmankarios.com |
| Ralph Porter Enterprises | Air Cargo Service | — |
| RAND WORLDWIDE | Aerospace | rand.com |
| Rand Worldwide Technologies | Tout Informatique et internet | rand.com |
| Remorquage Montreal Dorval | Boat Towing | remorquagedorval.com |
