Airlines — R
- RJTRA Jet Aeroservicios
- RBBRabbit-Air
- ACERace Cargo Airlines
- GBRRader Aviation
- BKHRAF Barkston Heath
- LCSRAF Leuchars
- SMZRAF Scampton
- STNRAF St Athan
- SMGRAF St Mawgan Search and Rescue
- TOFRAF Topcliffe Flying Training Unit
- VYTRAF Valley Flying Training Unit
- VLLRAF Valley SAR Training Unit
- MTLRAF-Avia
- RABRainbow Air (RAI)
- RAYRainbow Air Canada
- RUERainbow Air Euro
- RPORainbow Air Polynesia
- RNYRainbow Air US
- RAJRaji Airlines
- RKMRAK Airways
- RFARaleigh Flying Service
- REXRam Air Freight
- RMTRam Aircraft Corporation
- PPKRamp 66
- RGMRangemile Limited
- MWRRaslan Air Service
- RAQRath Aviaton
- CSMRatkhan Air
- RVRRaven Air
- REIRay Aviation
- RYTRaya Jet
- RTNRaytheon Aircraft Company
- RCJRaytheon Corporate Jets
- KSSRaytheon Travel Air
- RCBReal Aero Club De Baleares
- CDTReal Aero Club de Reus-Costa Dorado
- RCDReal Aeroclub De Ternerife
- RLVReal Aviation
- REBRebus
- SAKRed Arrows Display Squadron
- PSHRed Aviation
- RBNRed Baron Aviation
- DEVRed Devils Parachute Display Team
- RDVRed Sea Aviation
- RSVRed Sky Ventures
- STRRed Star
- RWZRed Wings
- BXRRedding Aero Enterprises
- RHCRedhill Aviation
- RAVReed Aviation
- REFReef Air
- REKReem Air
- RVVReeve Aleutian Airways
- RBHRegal Bahamas International Airways
- RGYRegency Airlines
- RAHRegent Air
- RAGRegio Air
- RGRRegion Air
- RAERégional
- TSHRegional 1
- RILRegional Air
- REWRegional Air Express
- N78Regional Air Iceland
- REGRegional Air Services
- RXARegional Express
- JJMRegional Geodata Air
- REPRegional Paraguaya
- CR1Regionalia Chile
- J88Regionalia México
- 2K2Regionalia Uruguay
- 9XXRegionalia Venezuela
- CEARegionsAir
- RELReliance Aviation
- RLTReliant Airlines
- RTSRelief Transport Services
- RANRenan
- ROAReno Air
- RGSRenown Aviation
- RPARepublic Airlines
- RPHRepublic Express Airlines
- SAFRepublic of Singapore Air Force
- RBCRepublicair
- RSTResort Air
- RXRREXAIR VIRTUEL
- RTLRheintalflug
- RDSRhoades Aviation
- RIURiau Airlines
- RIARich International Airways
- RVCRichards Aviation
- RICRichardson's Airway
- RCARichland Aviation
- HPRRick Lucas Helicopters
- RLERico Linhas A
- RIDRidder Avia
- RAKRiga Airclub
- RAZRijnmond Air Services
- POLRikspolisstyrelsen
- RIMRimrock Airlines
- SKARio Air Express
- REORio Airways