| Company | Search On | Records | Category | Sub category |
| QANTAS | QANTAS | 3 | Air Transport | Airlines |
| Quickstryp Chemical Co Ltd | Quickstryp | 9 | Materials | Solvents |
| | | | | |
| R.A.Brand & Co Ltd | RABrand | 17 | Factory | Logistics |
| Racal Instruments Ltd | Racal | 19 | Instrument Manufacturers | Test Equipment |
| Racasan Ltd | Racasan | 1 | Chemicals | Cleaning Agent |
| Radiator & Lamp Co | RadiatorLamp | 2 | Manufacturing | Sheet Metal Work |
| Radio Electric Clothing Company. The | RadioElectric | 2 | Clothing | Flying Clothing |
| Royal Air Force Recruitment (RAFRecruit) | RAFRecruit | 564 | Recruitment | RAFRecruit |
| Ragosine Oil Co Ltd | Ragosine | 19 | Lubricant Suppliers | |
| Railway Air Services Ltd | RailwayAirServices | 14 | Air Transport | Airlines |
| Ranalah Ltd | Ranalah | 47 | Fabrication | Sheet Metal Work |
| Randall's Metal Reflectors | RandallsReflectors | 1 | Factory | Lighting |
| Rank Audio Visual Ltd | RankAudio | 2 | Manufacturing | Electronics |
| Ransome & Marles Bearing Co Ltd | RansomeAndMarles | 164 | Components | Bearings |
| Ransomes Sims And Jeffries Ltd | RansomesSims | 15 | Airfields | Maintenance |
| Rapp Metals | RAPP | 23 | Materials | Metals |
| Ratcliffe Tool Co Ltd | RatcliffeTool | 3 | Manufacturing | Jig & Patternmakers |
| Ratier | Ratier | 8 | Components | Propellers |
| Ratin British Co Ltd. | Ratin | 16 | Factory | Pest Control |
| Raytheon International Data Systems | Raytheon | 1 | Airport Services | Passenger Handling |
| R.Bovier & Co Ltd | RBovier | 1 | Aeronautical Engineers | |
| RCA Aviation Eqpt | RCA | 26 | Avionics | Navigation |
| R.Cooper & Sons Ltd | RCooper | 2 | Manufacturing | Components |
| Reason Manufacturing Company Ltd. The | ReasonMfg | 1 | Aeronautical Engineers | |
| Reavell & Co Ltd | Reavell | 1 | Manufacturing | Machine Tools |
| Reaves Industrial Furnaces | ReavesIndustrial | 1 | Engineering Equipment | Heaters |
| Recaro GmbH + Co | Recaro | 1 | Components | Seating |
| Record Electrical Company Ltd. The | RecordElectrical | 7 | Components | Electrical |
| Recruitment Misc. | Recruitment | 12 | Recruitment | Aircrew |
| RedeX | RedeX | 3 | Lubricant Suppliers | |
| Redhill Aerodrome | Redhill | 2 | Airfields | |
| Redifon Ltd | Redifon | 79 | Training | Flight Simulation |
| Redline Motor Spirit Co Ltd | Redline | 4 | Fuel Suppliers | |
| Redrup | Redrup | 1 | Engine Manufacturers | |
| Redwing Aircraft Co Ltd | Redwing | 12 | Maintenance | Aircraft |
| Refrasil Company Ltd. British | Refrasil | 40 | Materials | Composites |
| Regent Carriage Co Ltd | RegentCarriage | 10 | Aircraft | Engineering |
| Regent Oil Company Ltd | RegentOil | 9 | Lubricant Suppliers | Oil |
| Rego Tailors | Rego | 4 | Clothing | Uniforms |
| Reid & Sigrist Ltd | ReidAndSigrist | 149 | Instrument Manufacturers | Flight Instruments |
| Relay Automatic Telephone Co Ltd. The | RelayTelephone | 2 | Factory | Telegraphy |
| Rellumit | Rellumit | 19 | Ground Equipment | Refuelling |
| Remington Rand Ltd | RemingtonRand | 5 | Factory | Administration |
| Remploy Ltd | Remploy | 2 | Logistics | Packaging |
| Renault | Renault | 3 | Engine Manufacturers | |
| Renfrew Foundries Ltd | Renfrew | 1 | Manufacturing | Castings |
| Renold & Coventry Chain Co Ltd | Renold | 12 | Manufacturing | Chains |
| Rent-A-Plane Ltd | RentAPlane | 1 | Air Transport | Aircraft Hire |
| Repair AG | Repair | 1 | Aircraft Manufacturers | Non UK |
| Replin Ltd. British | Replin | 15 | Role Equipment | Cabin Furnishings |
| Republic Aviation | RepublicAviation | 57 | Aircraft Manufacturers | Non UK |
| Research & Engineering Controls Ltd | ResearchEngineeringCont | 3 | Components | Controls |
| Research Engineers Ltd | ResearchEngineers | 15 | Airfields | Approach Aids |
| Revell | Revell | 2 | Models | Display |
| Revo Electric Co Ltd | Revo | 2 | Airfields | Lighting |
| Rex Motor Mfg Co Ltd | Rex | 1 | Engine Manufacturers | |
| Reynolds (Packaging) Ltd | ReynoldsPackaging | 1 | Logistics | Packing |
| Reynolds Tube | ReynoldsTube | 192 | Materials | Steel |
| R.F & F.W.Brown | RFBrown | 3 | Materials | Wood |
| RFD Company | RFD | 248 | Survival Equipment | Flotation Equipment |
| R.F.Saywell Ltd | RFSaywell | 2 | Aircraft Parts | Accessories |
| R.H.Nameplate Supplies Ltd | RHNameplate | 1 | Engineering | Markings |
| RHP Bearings Ltd | RHPBearings | 1 | Components | Bearings |
| R.H.Symonds Ltd | RHSymonds | 3 | Components | Seals |
| Richard Smith Ltd | RichardSmith | 7 | Airfields | Construction |
| Richmond Gas Stove & Meter Co Ltd. The | RichmondGas | 12 | Engineering | Furnaces |
| Rists Wires & Cables Ltd | Rists | 112 | Components | Wire |
| Rivers Engineering Co. The | RiversEngineering | 1 | Aeronautical Engineers | Components |
| R. J. Coley & Son | RJColey | 14 | Materials | Recycling |
| R & J Park Ltd | RJPark | 8 | Factory | Logistics |
| R.K.Dundas Ltd | RKDundas | 11 | Sales & Brokerage | Aircraft |
| R Lascelles & Co Ltd | RLascelles | 11 | Engine Manufacturers | |
| R.Lloyd & Co Ltd. | RLloyd | 3 | Engineering Equipment | Hand Tools |
| R.Malcolm Ltd | RMalcolm | 2 | Manufacturing | Sheet Metal Work |
| R.Mather & Son | RMather | 2 | Engineering Equipment | Hand Tools |
| R.M.R. Engineering | RMR | 2 | Components | AGS |
| Robert Riley Ltd | RobertRiley | 31 | Components | Springs |
| Robertson Coolers Ltd | Robertson | 8 | Components | Radiators |
| Robert Stuart (London) Ltd | RobertStuart | 2 | Manufacturing | Sheet Metal Work |
| Robert Young's Construction Company Ltd | RobertYoungs | 2 | Manufacturing | Components |
| Robin.Aviions Pierre | Robin | 22 | Aircraft Manufacturers | Non UK |
| Robinson Aircraft Co Ltd | Robinson | 7 | Aircraft Manufacturers | |
| Robinson & Cleaver | RobinsonAndCleaver | 39 | Clothing | Flying Clothing |
| Rockwell-Standard Corporation | Rockwell | 59 | Aircraft Manufacturers | Non UK |
| Rogers Aviation Cranfield | RogersAviation | 6 | Aircraft Suppliers | Distributors |
| Rogers Brothers | RogersBros | 1 | Materials | Fabric |
| Rogojarsky Ltd | Rogojarsky | 1 | Aircraft Manufacturers | Non UK |
| Rohrbach | Rohrbach | 14 | Aircraft Manufacturers | Non UK |
| Rollason Aircraft Services | Rollason | 65 | Sales & Brokerage | Aircraft |
| Rollason Aerocessories Ltd | RollasonAero | 11 | Testing | Test Equipment |
| Rolls-Royce Ltd |
RollsRoyce |
1200 | Engine Manufacturers | |
| Romeo. Officine Ferroviarie Meridionali | Romeo | 1 | Aircraft Manufacturers | Non UK |
| Ronald Trist & Co Ltd | RonaldTrist | 1 | Components | Seals |
| Roold | Roold | 3 | Clothing | Flying Clothing |
| ROP. Russian Oil Products Ltd | ROP | 7 | Fuel Suppliers | |
| Rose Bros (Gainsborough) Ltd | RoseBros | 5 | Finishes | Anodising |
| Rosemount Engineering Company Ltd | Rosemount | 4 | Components | Pressure Heads |
| Ross Courtney & Co Ltd | RossCourtney | 1 | Manufacturing | AGS |
| Rossell | Rossell | 10 | Engineering Equipment | Machine Tools |
| Rotameter Manufacturing Co Ltd | Rotameter | 8 | Instrument Manufacturers | Measuring Equipment |
| Rotax Ltd | Rotax | 397 | Components | Magnetos |
| Rotheram & Sons Ltd | Rotherams | 8 | Manufacturing | Machining |
| Rotheswan Servisales Ltd | Rotheswan | 3 | Ground Equipment | Jacks |
| Rotol | Rotol | 267 | Components | Propellers |
| Rototherm Co Ltd. The British | Rototherm | 5 | Engineering Equipment | Gauges |
| Rover Gas Turbines Ltd | Rover | 13 | Engine Manufacturers | APU |
| Rowloand Hodges Ltd | RowloandHodges | 1 | Manufacturing | AGS |
| Royston Instruments Ltd | Royston | 25 | Components | Electronics |
| Rozalex Ltd | Rozalex | 27 | Health And Safety | Personal Protection |
| R.P.R. Patents Ltd | RPRPatents | 1 | Testing | NDT |
| R.S.Brookman & Co | RSBrookman | 2 | Engineering Equipment | Drills |
| R.Taylor & Co (Ironfounders) Ltd | RTaylor | 1 | Manufacturing | Castings |
| Radio Transmission Equipment Ltd | RTE | 25 | Avionics | Navigation |
| Rubbaglas Ltd | Rubbaglas | 8 | Materials | Composites |
| Rubber Bonders Ltd | RubberBonders | 2 | Manufacturing | Rubber |
| Rubber Improvement Ltd | RubberImprovement | 2 | Manufacturing | Composites |
| Rubberine Ltd | Rubberine | 1 | Manufacturing | Components |
| Ruberoid Co Ltd. The | Ruberoid | 1 | Structures | Hangars |
| Rubery Owen & Co |
RuberyOwen |
220 | | |
| Rudolf Kahn | RudolfKahn | 1 | Manufacturing | Machine Tools |
| Ruffy-Baumann School Of Flying | RuffyBaumann | 78 | Training | Flying School |
| Rumbold & Co. L A | Rumbold | 304 | Components | Interiors |
| Runbaken Electrical Products | Runbaken | 13 | Engineering Equipment | Engraving |
| Rushton Engineering Co Ltd | RushtonEngineering | 1 | Components | Wiring Loom |
| Russel Bros | RusselBros | 1 | Engineering Equipment | Machinery |
| British Russell Parachute Co Ltd | RussellLobe | 17 | Survival Equipment | Parachutes |
| Russia Cement Co | RussiaCement | 2 | Materials | Adhesives |
| Ruston, Proctor & Co Ltd | RustonProctor | 3 | Factory | Heating |
| R.W. Munro Ltd | RWMunro | 22 | Instrument Manufacturers | Test Equipment |
| REA International Ltd | RyanREA | 1 | Avionics | Navigation |
| Rylard Ltd. Llewellyn | Rylard | 8 | Finishes | Varnish |
