| Abel Santamaria International Airport | SNU | Santa Clara | CU |
| Abraham Lincoln Capital Airport | SPI | Springfield | US |
| Adirondack Regional Airport | SLK | Saranac Lake | US |
| Adisoemarmo International Airport | SOC | Surakarta | ID |
| Adolino Bedin Regional Airport | SMT | Sorriso | BR |
| Aeródromo Estancia Don Panos | — | Presidencia Roca | AR |
| Aktau International Airport | SCO | Aktau | KZ |
| Alcantarí International Airport | SRE | Sucre | BO |
| Amílcar Cabral International Airport | SID | Espargos | CV |
| Antonio Maceo International Airport | SCU | Santiago | CU |
| Argyle International Airport | SVD | Kingstown | VC |
| Begum Nusrat Bhutto International Airport Sukkur | SKZ | Sukkur | PK |
| Charles M. Schulz Sonoma County Airport | STS | Santa Rosa | US |
| Cibao International Airport | STI | Santiago | DO |
| Comodoro Arturo Merino Benítez International Airport | SCL | Santiago | CL |
| Cyril E. King Airport | STT | Charlotte Amalie | VI |
| Deadhorse Airport | SCC | Deadhorse | US |
| Deputado Luiz Eduardo Magalhães International Airport | SSA | Salvador | BR |
| Domine Eduard Osok Airport | SOQ | Sorong | ID |
| Eduardo Falla Solano Airport | SVI | San Vicente Del Caguán | CO |
| El Salvador International Airport Saint Óscar Arnulfo Romero y Galdámez | SAL | San Salvador (San Luis Talpa) | SV |
| El Trompillo Airport | SRZ | Santa Cruz | BO |
| Fazenda Mimosa Airport | — | Ivinhema | BR |
| Fazenda Riozinho Airport | — | Corumbá | BR |
| Fernando Luis Ribas Dominicci Airport | SIG | San Juan | PR |
| Friedman Memorial Airport | SUN | Hailey | US |
| General Ulpiano Paez International Airport | SNC | Salinas/La Libertad | EC |
| George F. L. Charles Airport | SLU | Castries | LC |
| Godo Holo Airstrip | — | Pikienkondre of Miranda | SR |
| Grand Case-l'Espérance Airport | SFG | Grand Case | MF |
| Grant County Airport | SVC | Silver City | US |
| Henry E. Rohlsen Airport | STX | Christiansted | VI |
| Hévíz–Balaton Airport | SOB | Sármellék | HU |
| Istanbul Sabiha Gökçen International Airport | SAW | Pendik, Istanbul | TR |
| Jenderal Ahmad Yani Airport | SRG | Semarang | ID |
| Jieyang Chaoshan International Airport | SWA | Jieyang (Rongcheng) | CN |
| Jingzhou Shashi Airport | SHS | Jingzhou (Shashi) | CN |
| John Greif II Airport | SPR | San Pedro | BZ |
| John Wayne Orange County International Airport | SNA | Santa Ana | US |
| Jorge E. Gonzalez Torres Airport | SJE | San José Del Guaviare | CO |
| Juan Santamaría International Airport | SJO | San José (Alajuela) | CR |
| Juan Vicente Gómez International Airport | SVZ | San Antonio del Tachira | VE |
| Juancho E. Yrausquin Airport | SAB | Zion's Hill | BQ |
| Juanda International Airport | SUB | Surabaya | ID |
| K50 Airstrip | — | Mogadishu | SO |
| Kangerlussuaq International Airport | SFJ | Kangerlussuaq | GL |
| King Mswati III International Airport | SHO | Mpaka | SZ |
| Koltsovo Airport | SVX | Yekaterinburg | RU |
| La Palma Airport | SPC | Sta Cruz de la Palma, La Palma Island | ES |
| Lamezia Terme Sant'Eufemia International Airport | SUF | Lamezia Terme (CZ) | IT |
| Las Américas International Airport | SDQ | Santo Domingo | DO |
| Las Marías Airport | — | Valdivia | CL |
| Lemhi County Airport | SMN | Salmon | US |
| London Southend Airport | SEN | Southend-on-Sea, Essex | GB |
| London Stansted Airport | STN | London, Essex | GB |
| Los Cabos International Airport | SJD | San José del Cabo | MX |
| Louisville Muhammad Ali International Airport | SDF | Louisville | US |
| Lubango Mukanka International Airport | SDD | Lubango | AO |
| Luis Alberto Lehr Airport | SRA | Santa Rosa | BR |
| Luis Munoz Marin International Airport | SJU | San Juan | PR |
| Malabo International Airport | SSG | Malabo | GQ |
| Marechal Cunha Machado International Airport | SLZ | São Luís | BR |
| Martín Miguel de Güemes International Airport | SLA | Salta | AR |
| Mathilda Batlayeri Airport | SXK | Saumlaki-Yamdena Island | ID |
| Mayor Buenaventura Vivas International Airport | STD | Santo Domingo | VE |
| Mbanza Congo Airport | SSY | Mbanza Congo | AO |
| Menongue Airport | SPP | Menongue | AO |
| Nakashibetsu Airport | SHB | Nakashibetsu | JP |
| Nanki Shirahama Airport | SHM | Shirahama | JP |
| Nausori International Airport | SUV | Nausori | FJ |
| New York Stewart International Airport | SWF | Newburgh | US |
| Norman Y. Mineta San Jose International Airport | SJC | San Jose | US |
| Nunam Iqua Airport | SXP | Nunam Iqua | US |
| Olsztyn-Mazury Airport | SZY | Szymany | PL |
| Orlando Sanford International Airport | SFB | Orlando | US |
| Palo Verde Airport | SRL | Mulegé | MX |
| Plan de Guadalupe International Airport | SLW | Saltillo | MX |
| Ponciano Arriaga International Airport | SLP | San Luis Potosí | MX |
| Preguiça Airport | SNE | Preguiça | CV |
| Princess Juliana International Airport | SXM | Sint Maarten | SX |
| Prof. Eribelto Manoel Reino State Airport | SJP | São José do Rio Preto | BR |
| Professor Urbano Ernesto Stumpf Airport | SJK | São José Dos Campos | BR |
| Pu'er Simao Airport | SYM | Pu'er | CN |
| Ramón Villeda Morales International Airport | SAP | San Pedro Sula | HN |
| Robert L. Bradshaw International Airport | SKB | Basseterre | KN |
| Saarbrücken Airport | SCN | Saarbrücken | DE |
| Sabetta International Airport | SBT | Sabetta | RU |
| Sabha Airport | SEB | Sabha | LY |
| Sacramento International Airport | SMF | Sacramento | US |
| Sadiq Abubakar III International Airport | SKO | Sokoto | NG |
| Sado Airport | SDS | Sado | JP |
| Saibai Island Airport | SBR | Saibai Island | AU |
| Saidpur Airport | SPD | Saidpur | BD |
| Saint Cloud Regional Airport | STC | Saint Cloud | US |
| Saint-Nazaire-Montoir Airport | SNR | Saint-Nazaire/Montoir | FR |
| Sainte Marie Airport | SMS | Vohilava | MG |
| Saipan International Airport | SPN | I Fadang, Saipan | MP |
| Sakkyryr Airport | SUK | Batagay-Alyta | RU |
| Sakon Nakhon Airport | SNO | — | TH |
| Salalah International Airport | SLL | Salalah | OM |
| Salamanca Airport | SLM | Salamanca | ES |
| Salekhard Airport | SLY | Salekhard | RU |
| Salem-Willamette Valley Airport/McNary Field | SLE | Salem | US |
| Salina Municipal Airport | SLN | Salina | US |
| Salisbury Ocean City Wicomico Regional Airport | SBY | Salisbury | US |
| Salt Cay Airport | SLX | Salt Cay | TC |
| Salt Lake City International Airport | SLC | Salt Lake City | US |
| Salzburg Airport | SZG | Salzburg | AT |
| Samarkand International Airport | SKD | Samarkand | UZ |
| Sambava Airport | SVB | Sambava | MG |
| Samos Airport | SMI | Samos Island | GR |
| Sampit (H.Asan) Airport | SMQ | Sampit | ID |
| Samsun-Çarşamba Airport | SZF | Samsun | TR |
| San Andros Airport | SAQ | Andros Island | BS |
| San Angelo Regional Mathis Field | SJT | San Angelo | US |
| San Antonio International Airport | SAT | San Antonio | US |
| San Bernardino International Airport | SBD | San Bernardino | US |
| San Carlos Airport | SQL | San Carlos | US |
| San Cristóbal Airport | SCY | Puerto Baquerizo Moreno | EC |
| San Diego International Airport | SAN | San Diego | US |
| San Francisco International Airport | SFO | San Francisco | US |
| San Jose Airport | SJI | San Jose | PH |
| San Luis County Regional Airport | SBP | San Luis Obispo | US |
| San Pedro Airport | SPY | — | CI |
| San Tomé Airport | SOM | El Tigre | VE |
| San Vicente Airport | SWL | San Vicente | PH |
| Sanaa International Airport | SAH | Sanaa | YE |
| Sanandaj Airport | SDG | — | IR |
| Sand Point Airport | SDP | Sand Point | US |
| Sandakan Airport | SDK | Sandakan | MY |
| Sandane Airport, Anda | SDN | Sandane | NO |
| Sandnessjøen Airport, Stokka | SSJ | Alstahaug | NO |
| Sanming Shaxian Airport | SQJ | Sanming (Sha) | CN |
| Santa Barbara Municipal Airport | SBA | Santa Barbara | US |
| Santa Cruz/Graciosa Bay/Luova Airport | SCZ | Santa Cruz/Graciosa Bay/Luova | SB |
| Santa Elena de Uairén Airport | SNV | Santa Elena de Uairén | VE |
| Santa Fe Municipal Airport | SAF | Santa Fe | US |
| Santa Magalhães Airport | SET | Serra Talhada | BR |
| Santa Maria Airport | SMA | Vila do Porto | PT |
| Santa Maria Public Airport Captain G Allan Hancock Field | SMX | Santa Maria | US |
| Santa Teresita Airport | SST | Santa Teresita | AR |
| Santarém - Maestro Wilson Fonseca International Airport | STM | Santarém | BR |
| Santiago-Rosalía de Castro Airport | SCQ | Santiago de Compostela | ES |
| Santo Pekoa International Airport | SON | Luganville | VU |
| Santos Dumont Airport | SDU | Rio de Janeiro | BR |
| Sanya Phoenix International Airport | SYX | Sanya (Tianya) | CN |
| São Filipe Airport | SFL | São Filipe | CV |
| São Gabriel da Cachoeira Airport | SJL | São Gabriel da Cachoeira | BR |
| São Jorge Airport | SJZ | Velas | PT |
| Sara Airport | SSR | Pentecost Island | VU |
| Sarajevo International Airport | SJJ | Sarajevo | BA |
| Saransk International Airport | SKX | Saransk | RU |
| Sarasota Bradenton International Airport | SRQ | Sarasota/Bradenton | US |
| Sari Dasht-e Naz International Airport | SRY | Sari | IR |
| Saskylakh Airport | SYS | Saskylakh | RU |
| Satu Mare International Airport | SUJ | Satu Mare | RO |
| Sauce Viejo Airport | SFN | Santa Fe | AR |
| Savannah Hilton Head International Airport | SAV | Savannah | US |
| Savonlinna Airport | SVL | Savonlinna | FI |
| Savoonga Airport | SVA | Savoonga | US |
| Savusavu Airport | SVU | Savusavu | FJ |
| Scammon Bay Airport | SCM | Scammon Bay | US |
| Scandinavian Mountains Airport | SCR | Malung-Sälen | SE |
| Seattle–Tacoma International Airport | SEA | Seattle | US |
| Seldovia Airport | SOV | Seldovia | US |
| Semera Airport | SZE | Semera | ET |
| Semnan Municipal Airport | SNX | Semnan | IR |
| Sendai Airport | SDJ | Natori | JP |
| Seronera Airport | SEU | Seronera | TZ |
| Seve Ballesteros-Santander Airport | SDR | Santander | ES |
| Seville Airport | SVQ | Seville | ES |
| Seychelles International Airport | SEZ | Victoria | SC |
| Sfax Thyna International Airport | SFA | Sfax | TN |
| Shakawe Airport | SWX | Shakawe | BW |
| Shaktoolik Airport | SKK | Shaktoolik | US |
| Shanghai Hongqiao International Airport | SHA | Shanghai (Minhang) | CN |
| Shangrao Sanqingshan Airport | SQD | Shangrao (Hengfeng) | CN |
| Shannon Airport | SNN | Shannon | IE |
| Sharjah International Airport | SHJ | Sharjah | AE |
| Sharm El Sheikh International Airport | SSH | Sharm El Sheikh | EG |
| Sharurah Domestic Airport | SHW | Sharurah | SA |
| Sheikh ul Alam International Airport | SXR | Srinagar | IN |
| Shenandoah Valley Regional Airport | SHD | Weyers Cave | US |
| Shenyang Taoxian International Airport | SHE | Shenyang | CN |
| Shenzhen Bao'an International Airport | SZX | Shenzhen | CN |
| Sheremetyevo International Airport | SVO | Moscow | RU |
| Sheridan County Airport | SHR | Sheridan | US |
| Shihezi Huayuan Airport | SHF | Shihezi | CN |
| Shijiazhuang Zhengding International Airport | SJW | Shijiazhuang | CN |
| Shillong Airport | SHL | Shillong | IN |
| Shimojishima Airport | SHI | Miyakojima | JP |
| Shinyanga Airport | SHY | Shinyanga | TZ |
| Shiraz Shahid Dastghaib International Airport | SYZ | Shiraz | IR |
| Shirdi International Airport | SAG | Kakadi | IN |
| Shire Inda Selassie Airport | SHC | Shire Inda Selassie | ET |
| Shishmaref Airport | SHH | Shishmaref | US |
| Shonai Airport | SYO | Shonai | JP |
| Show Low Regional Airport | SOW | Show Low | US |
| Shreveport Regional Airport | SHV | Shreveport | US |
| Shungnak Airport | SHG | Shungnak | US |
| Shuozhou Zirun Airport | SZH | Shuozhou | CN |
| Sialkot International Airport | SKT | Sialkot | PK |
| Sibiu International Airport | SBZ | Sibiu | RO |
| Sibu Airport | SBW | Sibu | MY |
| Sidney - Richland Regional Airport | SDY | Sidney | US |
| Siem Reap-Angkor International Airport | SAI | Siem Reap | KH |
| Silgadi Doti Airport | SIH | Silgadi Doti | NP |
| Simara Airport | SIF | Simara | NP |
| Simferopol International Airport | SIP | Simferopol | UA |
| Simón Bolívar International Airport | SMR | Santa Marta | CO |
| Sindhudurg Airport | SDW | Chipi | IN |
| Singapore Changi Airport | SIN | Singapore | SG |
| Sioux Gateway Airport / Brigadier General Bud Day Field | SUX | Sioux City | US |
| Sishen Airport | SIS | Sishen | ZA |
| Sitka Rocky Gutierrez Airport | SIT | Sitka | US |
| Skagway Airport | SGY | Skagway | US |
| Skellefteå Airport | SFT | Skellefteå | SE |
| Skiros Airport | SKU | Skiros Island | GR |
| Skopje International Airport | SKP | Ilinden | MK |
| Skukuza Airport | SZK | Skukuza | ZA |
| Sleetmute Airport | SLQ | Sleetmute | US |
| Sliač Airport | SLD | Sliač | SK |
| Smara Airport | SMW | Smara | EH |
| Snake Bay Airport | SNB | Milikapiti | AU |
| Socotra Airport | SCT | Mori | YE |
| Sofia Airport | SOF | Sofia | BG |
| Sogndal Airport, Haukåsen | SOG | Sogndal | NO |
| Sola Airport | SLH | Sola | VU |
| Solidarity Szczecin–Goleniów Airport | SZZ | Szczecin(Glewice) | PL |
| Solwesi Airport | SLI | Solwesi | ZM |
| Sønderborg Airport | SGD | Sønderborg | DK |
| Sørkjosen Airport | SOJ | Sørkjosen | NO |
| Sorocaba Airport | SOD | Sorocaba | BR |
| Soroti Airport | SRT | Soroti | UG |
| South Bend International Airport | SBN | South Bend | US |
| Southampton Airport | SOU | Southampton | GB |
| Soyo Airport | SZA | Soyo | AO |
| Sphinx International Airport | SPX | Al Jiza | EG |
| Split Saint Jerome Airport | SPU | Split | HR |
| Springfield Branson National Airport | SGF | Springfield | US |
| Srednekolymsk Airport | SEK | Srednekolymsk | RU |
| St George Airport | SGO | — | AU |
| St George Airport | STG | St George | US |
| St George Regional Airport | SGU | St George | US |
| St Michael Airport | SMK | St Michael | US |
| St Paul Island Airport | SNP | St Paul Island | US |
| St-François Airport | SFC | St-François | GP |
| St. Jean Airport | SBH | Gustavia | BL |
| St. Louis Lambert International Airport | STL | St Louis | US |
| State College Regional Airport | SCE | State College | US |
| Stavanger Airport, Sola | SVG | Stavanger | NO |
| Stavropol Shpakovskoye Airport | STW | Stavropol | RU |
| Stella Maris Airport | SML | Stella Maris | BS |
| Stevens Village Airport | SVS | Stevens Village | US |
| Stillwater Regional Airport | SWO | Stillwater | US |
| Stockton Metropolitan Airport | SCK | Stockton | US |
| Stokmarknes Airport, Skagen | SKN | Hadsel | NO |
| Stony River 2 Airport | SRV | Stony River | US |
| Stord Airport, Sørstokken | SRP | Leirvik | NO |
| Stornoway Airport | SYY | Stornoway, Western Isles | GB |
| Strasbourg Airport | SXB | Strasbourg | FR |
| Stronsay Airport | SOY | Stronsay | GB |
| Stuart Island Airpark | SSW | Friday Harbor | US |
| Stuttgart Airport | STR | Stuttgart | DE |
| Subic Bay International Airport / Naval Air Station Cubi Point | SFS | Olongapo | PH |
| Suceava Ștefan cel Mare International Airport | SCV | Suceava | RO |
| Sultan Abdul Aziz Shah International Airport | SZB | Subang | MY |
| Sultan Muhammad Kaharuddin III Airport | SWQ | Sumbawa Besar | ID |
| Summer Beaver Airport | SUR | Summer Beaver | CA |
| Sundsvall-Härnösand Airport | SDL | Sundsvall/ Härnösand | SE |
| Suntar Airport | SUY | Suntar | RU |
| Surat International Airport | STV | Surat | IN |
| Surgut International Airport | SGC | Surgut | RU |
| Surigao Airport | SUG | Surigao City | PH |
| Surkhet Airport | SKH | Surkhet | NP |
| Svolvær Airport, Helle | SVJ | Svolvær | NO |
| Sydney Kingsford Smith International Airport | SYD | Sydney (Mascot) | AU |
| Syktyvkar Airport | SCW | Syktyvkar | RU |
| Syracuse Hancock International Airport | SYR | Syracuse | US |
| Tan Son Nhat International Airport | SGN | Ho Chi Minh City | VN |
| Tebelian Airport | SQG | Sintang | ID |
| Thandwe Airport | SNW | Thandwe | MM |
| Thessaloniki Macedonia International Airport | SKG | Thessaloniki | GR |
| Tobías Bolaños International Airport | SYQ | San Jose | CR |
| Vicecomodoro Angel D. La Paz Aragonés Airport | SDE | Santiago del Estero | AR |
| Vladislav Ardzinba Sukhum International Airport | SUI | Sukhumi | GE |
| Warraber Island Airport | SYU | Sue Islet | AU |
| Wichita Falls Municipal Airport / Sheppard Air Force Base | SPS | Wichita Falls | US |
| Zaysan Airport | SZI | Zaysan | KZ |