| ICAO | IATA | NAME |
|---|
| RJT | | RA Jet Aeroservicios |
| RBB | | Rabbit-Air |
| ACE | | Race Cargo Airlines |
| R6 | RACSA |
| GBR | | Rader Aviation |
| 1D | Radixx Solutions International |
| BKH | | RAF Barkston Heath |
| LCS | | RAF Leuchars |
| SMZ | | RAF Scampton |
| STN | | RAF St Athan |
| SMG | | RAF St Mawgan Search and Rescue |
| TOF | | RAF Topcliffe Flying Training Unit |
| VYT | | RAF Valley Flying Training Unit |
| VLL | | RAF Valley SAR Training Unit |
| MTL | | RAF-Avia |
| RAJ | | Raji Airlines |
| RKM | | RAK Airways |
| RFA | | Raleigh Flying Service |
| REX | | Ram Air Freight |
| RMT | | Ram Aircraft Corporation |
| PPK | | Ramp 66 |
| RGM | | Rangemile Limited |
| MWR | | Raslan Air Service |
| RAQ | | Rath Aviaton |
| CSM | | Ratkhan Air |
| RVN | | Raven Air |
| RVR | | Raven Air |
| REI | | Ray Aviation |
| RYT | | Raya Jet |
| RTN | | Raytheon Aircraft Company |
| RCJ | | Raytheon Corporate Jets |
| KSS | | Raytheon Travel Air |
| RCB | | Real Aero Club De Baleares |
| CDT | | Real Aero Club de Reus-Costa Dorado |
| RCD | | Real Aeroclub De Ternerife |
| RLV | | Real Aviation |
| REB | | Rebus |
| SAK | | Red Arrows Display Squadron |
| PSH | | Red Aviation |
| RBN | | Red Baron Aviation |
| DEV | | Red Devils Parachute Display Team |
| RDV | | Red Sea Aviation |
| RSV | | Red Sky Ventures |
| STR | | Red Star |
| BXR | | Redding Aero Enterprises |
| RHC | 8L | Redhill Aviation |
| RAV | | Reed Aviation |
| REF | | Reef Air |
| REK | V4 | Reem Air |
| RVV | | Reeve Aleutian Airways |
| RBH | | Regal Bahamas International Airways |
| RGY | | Regency Airlines |
| RAH | | Regent Air |
| RAG | | Regio Air |
| RGR | | Region Air |
| TSH | | Regional 1 |
| RIL | | Regional Air |
| REW | | Regional Air Express |
| RGL | | Regional Air Lines |
| REG | | Regional Air Services |
| FN | Regional Airlines |
| RXA | ZL | Regional Express |
| JJM | | Regional Geodata Air |
| CEA | 3C | RegionsAir |
| REL | | Reliance Aviation |
| RLT | | Reliant Airlines |
| RTS | | Relief Transport Services |
| RAN | | Renan |
| ROA | QQ | Reno Air |
| RGS | | Renown Aviation |
| RPA | RW | Republic Airlines |
| RPH | RH | Republic Express Airlines |
| SAF | | Republic of Singapore Air Force |
| RBC | | Republicair |
| RST | | Resort Air |
| RAE | YS | Régional |
| RDS | | Rhoades Aviation |
| RIU | | Riau Airlines |
| RIA | | Rich International Airways |
| RVC | | Richards Aviation |
| RCA | | Richland Aviation |
| HPR | | Rick Lucas Helicopters |
| RLE | C7 | Rico Linhas Aéreas |
| RID | | Ridder Avia |
| RAK | | Riga Airclub |
| RAZ | | Rijnmond Air Services |
| POL | | Rikspolisstyrelsen |
| RIM | | Rimrock Airlines |
| SKA | | Rio Air Express |
| REO | | Rio Airways |
| GRN | E2 | Rio Grande Air |
| RSL | SL | Rio Sul Serviços Aéreos Regionais |
| RVM | | River Ministries Air Charter |
| RGP | | River State Government of Nigeria |
| UNR | | Rivne Universal Avia |
| RDL | | Roadair Lines |
| RBT | | Robinton Aero |
| ROX | | Roblex Aviation |
| RKW | | Rockwell Collins Avionics |
| ROC | | Rocky Mountain Airlines |
| RMA | | Rocky Mountain Airways |
| LIF | | Rocky Mountain Holdings |
| RDZ | | Rodze Air |
| FAD | | Rog-Air |
| RRZ | | Rollright Aviation |
| RRL | | Rolls-Royce Limited |
| BTU | | Rolls-Royce plc |
| ROF | | Romanian Air Force |
| RMV | | Romavia |
| RNS | | Ronso |
| ROR | | Roraima Airways |
| RNB | | Rosneft-Baltika |
| NRG | | Ross Aviation |
| RSS | | Rossair |
| RFS | | Rossair |
| ROS | | Rossair Europe |
| SDM | FV | Rossiya |
| RAL | | Roswell Airlines |
| RAR | GZ | Rotation International Air Services |
| RTR | | Rotatur |
| RKT | | Rotormotion |
| JCR | | Rotterdam Jet Center |
| ROV | | Rover Airways International |
| VOS | | Rovos Air |
| RCG | | Royal Air Cargo |
| SHF | | Royal Air Force |
| RRF | | Royal Air Force |
| RRR | | Royal Air Force |
| ACW | | Royal Air Force |
| RFR | RR | Royal Air Force |
| MJN | RS | Royal Air Force of Oman |
| RAX | | Royal Air Freight |
| RAM | AT | Royal Air Maroc |
| RPK | R0 | Royal Airlines |
| RLM | | Royal American Airways |
| RYL | V5 | Royal Aruban Airline |
| ASY | | Royal Australian Air Force |
| RXP | | Royal Aviation Express |
| RYB | | Royal Bahrain Airlines |
| RBA | BI | Royal Brunei Airlines |
| KDR | | Royal Daisy Airlines |
| RGA | | Royal Ghanaian Airlines |
| ROJ | | Royal Jet |
| RJA | RJ | Royal Jordanian |
| RJZ | | Royal Jordanian Air Force |
| RKH | RK | Royal Khmer Airlines |
| RMF | | Royal Malaysian Air Force |
| NVY | | Royal Navy |
| RNA | RA | Royal Nepal Airlines |
| NRN | | Royal Netherland Navy |
| NAF | | Royal Netherlands Air Force |
| KIW | | Royal New Zealand Air Force |
| NOW | | Royal Norwegian Air Force |
| ROP | | Royal Oman Police |
| PPW | RL | Royal Phnom Penh Airways |
| RRA | | Royal Rwanda Airlines |
| RSF | | Royal Saudi Air Force |
| RYS | | Royal Sky |
| RSN | | Royal Swazi National Airways |
| HRH | WR | Royal Tongan Airlines |
| RWE | | Royal West Airlines |
| ARP | | RPA-Aviataxi Ltd. |
| RSB | | Rubystar |
| RMG | | Rumugu Air & Space Nigeria |
| RUR | | Rusaero |
| KLE | | Rusaero |
| CGI | | Rusair JSAC |
| RUH | | Rusich-T |
| RLU | | Rusline |
| MIG | | Russian Aircraft Corporation-MiG |
| RFF | | Russian Federation Air Force |
| ESL | P7 | Russian Sky Airlines |
| RUZ | | Rusuertol |
| RUC | | Rutas Aereas |
| RND | | Rutland Aviation |
| RUA | | Rwanda Airlines |
| RWA | | Rwanda Airways |
| RWD | WB | Rwandair Express |
| RWL | | RWL Luftfahrtgesellschaft |
| RCT | | Ryan Air Service |
| RYA | | Ryan Air Services |
| RYN | RD | Ryan International Airlines |
| RYR | FR | Ryanair |
| RYZ | | Ryazan State Air Enterprise |
| RAA | | Rynes Aviation |
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