| 28 de Noviembre Airport | RYO | Rio Turbio | AR |
| Almirante Marco Andres Zar Airport | REL | Rawson | AR |
| Almirante Padilla Airport | RCH | Riohacha | CO |
| Alxa Right Banner Badanjilin Airport | RHT | Badanjilin | CN |
| Arar Domestic Airport | RAE | Arar | SA |
| Arua Airport | RUA | Arua | UG |
| Bayannur Tianjitai Airport | RLK | Bayannur | CN |
| Borba Airport | RBB | Borba | BR |
| Bornholm Airport | RNN | Rønne | DK |
| Capitán Av. Selin Zeitun Lopez Airport | RIB | Riberalta | BO |
| Central Wyoming Regional Airport | RIW | Riverton | US |
| Chicago Rockford International Airport | RFD | Chicago/Rockford | US |
| Chişinău International Airport | RMO | Chişinău | MD |
| Chofu Airport | — | Chofu | JP |
| Colombo Ratmalana International Airport | RML | Colombo | LK |
| Copenhagen Roskilde Airport | RKE | Roskilde | DK |
| Corn Island Airport | RNI | Corn Island | NI |
| David Constantijn Saudale Airport | RTI | Ba'a - Rote Island | ID |
| Federico Fellini International Airport | RMI | Rimini (RN) | IT |
| Frans Sales Lega Airport | RTG | Satar Tacik, Manggarai | ID |
| Frederick Douglass Greater Rochester International Airport | ROC | Rochester | US |
| General Lucio Blanco International Airport | REX | Reynosa | MX |
| Gobernador Ramón Trejo Noel International Airport | RGA | Rio Grande | AR |
| Itbayat Jorge Abad Airport | — | Itbayat | PH |
| Jacarepaguá - Roberto Marinho Airport | RRJ | Rio de Janeiro | BR |
| Juan Manuel Gálvez International Airport | RTB | Coxen Hole | HN |
| Kazi Nazrul Islam Airport | RDP | Durgapur | IN |
| King Khalid International Airport | RUH | Riyadh | SA |
| Knox County Regional Airport | RKD | Rockland | US |
| Leite Lopes Airport | RAO | Ribeirão Preto | BR |
| Los Colonizadores Airport | RVE | Saravena | CO |
| Maavaarulaa Airport | RUL | Maavaarulu | MV |
| Maestro Marinho Franco Airport | ROO | Rondonópolis | BR |
| Marau Airport | RUS | Marau | SB |
| Marinda Airport | RJM | Waisai | ID |
| Marrakesh Menara Airport | RAK | Marrakesh | MA |
| Marsa Alam International Airport | RMF | Marsa Alam | EG |
| Mentawai Airport | RKI | Sipura Island | ID |
| Nelson Mandela International Airport | RAI | Praia | CV |
| Niijima Airport | — | Niijima Village | JP |
| Orang (Chongjin) Airport | RGO | Hoemun-ri | KP |
| Orenburg Central Airport | REN | Orenburg | RU |
| Palanan Community Airport | — | Palanan | PH |
| Piloto Civil Norberto Fernández International Airport | RGL | Rio Gallegos | AR |
| Pingtung Air Force Base North | — | Pingtung | TW |
| Platov International Airport | ROV | Rostov-on-Don | RU |
| Pres. Gral. Óscar D. Gestido Binational Airport | RVY | Rivera/Santana do Livramento | UY |
| Rabat-Salé Airport | RBA | Rabat | MA |
| Rafha Domestic Airport | RAH | Rafha | SA |
| Rafsanjan Airport | RJN | Rafsanjan | IR |
| Raiatea Airport | RFP | Uturoa | PF |
| Raivavae Airport | RVV | — | PF |
| Rajahmundry Airport | RJA | Madhurapudi | IN |
| Raleigh-Durham International Airport | RDU | Raleigh/Durham | US |
| Ramata Airport | RBV | Ramata | SB |
| Ramingining Airport | RAM | — | AU |
| Rampart Airport | RMP | Rampart | US |
| Ramsar Airport | RZR | Ramsar | IR |
| Rangiroa Airport | RGI | — | PF |
| Rapid City Regional Airport | RAP | Rapid City | US |
| Raroia Airport | RRR | Raroia | PF |
| Rarotonga International Airport | RAR | Avarua | CK |
| Ras Al Khaimah International Airport | RKT | Ras Al Khaimah | AE |
| Recife/Guararapes - Gilberto Freyre International Airport | REC | Recife | BR |
| Red Devil Airport | RDV | Red Devil | US |
| Red Sea International Airport | RSI | Hanak | SA |
| Redding Municipal Airport | RDD | Redding | US |
| Reggio Calabria Airport | REG | Reggio Calabria | IT |
| Region of Murcia International Airport | RMU | Corvera | ES |
| Rennell/Tingoa Airport | RNL | Rennell Island | SB |
| Rennes-Saint-Jacques Airport | RNS | Saint-Jacques-de-la-Lande, Ille-et-Vilaine | FR |
| Reno Tahoe International Airport | RNO | Reno | US |
| Resistencia International Airport | RES | Resistencia | AR |
| Retalhuleu Airport | RER | Retalhuleu | GT |
| Reus Airport | REU | Reus | ES |
| Rewa Airport, Chorhata, REWA | REW | Rewa | IN |
| Reykjavík Domestic Airport | RKV | Reykjavík | IS |
| Rhinelander Oneida County Airport | RHI | Rhinelander | US |
| Rhodes International Airport "Diagoras" | RHO | Rhodes | GR |
| Richards Bay Airport | RCB | Richards Bay | ZA |
| Richmond Airport | RCM | — | AU |
| Richmond International Airport | RIC | Richmond | US |
| Riga International Airport | RIX | Riga | LV |
| Rijeka Airport | RJK | Rijeka(Omišalj) | HR |
| Rimatara Airport | RMT | Rimatara Island | PF |
| Rio Branco-Plácido de Castro International Airport | RBR | Rio Branco | BR |
| Rishiri Airport | RIS | Rishiri | JP |
| Rivne International Airport | RWN | Rivne | UA |
| Riyan International Airport | RIY | Mukalla(Riyan) | YE |
| Rize–Artvin Airport | RZV | Rize | TR |
| Rizhao Shanzihe Airport | RIZ | Rizhao (Donggang) | CN |
| Roanoke–Blacksburg Regional Airport | ROA | Roanoke | US |
| Roberts Field | RDM | Redmond | US |
| Roberts International Airport | ROB | Monrovia | LR |
| Roche Harbor Airport | RCE | Roche Harbor | US |
| Rochester International Airport | RST | Rochester | US |
| Rock Sound International Airport | RSD | Rock Sound | BS |
| Rockhampton Airport | ROK | Rockhampton | AU |
| Rodez–Aveyron Airport | RDZ | Rodez/Marcillac | FR |
| Roi Et Airport | ROI | Roi Et | TH |
| Roland Garros Airport | RUN | Sainte-Marie | RE |
| Roma Airport | RMA | Roma | AU |
| Roman Tmetuchl International Airport | ROR | Babelthuap Island | PW |
| Rongelap Island Airport | RNP | Rongelap Island | MH |
| Ronneby Airport | RNB | Ronneby | SE |
| Røros Airport | RRS | Røros | NO |
| Rørvik Airport, Ryum | RVK | Rørvik | NO |
| Rosario Islas Malvinas International Airport | ROS | Rosario | AR |
| Røst Airport | RET | Røst | NO |
| Rostock-Laage Airport | RLG | Laage | DE |
| Roswell Air Center Airport | ROW | Roswell | US |
| Rota International Airport | ROP | Rota Island | MP |
| Rotorua Regional Airport | ROT | Rotorua | NZ |
| Rotterdam The Hague Airport | RTM | Rotterdam | NL |
| Rotuma Airport | RTA | Rotuma | FJ |
| Rovaniemi Airport | RVN | Rovaniemi | FI |
| Roxas Airport | RXS | Roxas City | PH |
| Ruby Airport | RBY | Ruby | US |
| Ruoqiang Loulan Airport | RQA | Ruoqiang Town | CN |
| Rurrenabaque Airport | RBQ | Rurrenabaque | BO |
| Rurutu Airport | RUR | — | PF |
| Russian Mission Airport | RSH | Russian Mission | US |
| Rutland - Southern Vermont Regional Airport | RUT | Rutland | US |
| Rzeszów-Jasionka Airport | RZE | Jasionka | PL |
| Santa Maria Airport | RIA | Santa Maria | BR |
| Santa Rosa Airport | RSA | Santa Rosa | AR |
| Sardar-e-Jangal Airport | RAS | Rasht | IR |
| Scarlett Martinez International Airport | RIH | Río Hato | PA |
| Shah Makhdum Airport | RJH | Rajshahi | BD |
| Shaikh Zaid Airport | RYK | Rahim Yar Khan | PK |
| Sir Charles Gaetan Duval Airport | RRG | Port Mathurin | MU |
| Southwest Florida International Airport | RSW | Fort Myers | US |
| Southwest Wyoming Regional Airport | RKS | Rock Springs | US |
| Staroselye Airport | RYB | Rybinsk | RU |
| Swami Vivekananda Airport | RPR | Raipur | IN |
| Taichung International Airport / Ching Chuang Kang Air Base | RMQ | Taichung (Qingshui) | TW |
| Termas de Río Hondo international Airport | RHD | Termas de Río Hondo | AR |
| Tobolsk Remezov Airport | RMZ | Tobolsk | RU |
| Tokua Airport | RAB | Kokopo | PG |
| Warsaw Radom Airport | RDO | Radom | PL |
| Xigaze Peace Airport / Shigatse Air Base | RKZ | Xigazê (Samzhubzê) | CN |
| Yangon International Airport | RGN | Yangon | MM |
| Yeosu Airport | RSU | Yeosu | KR |
| Yoron Airport | RNJ | Yoron | JP |