| Abraham González International Airport | CJS | Ciudad Juárez | MX |
| Ahmed Sékou Touré International Airport | CKY | Conakry | GN |
| Akron Canton Regional Airport | CAK | Akron | US |
| Alejandro Velasco Astete International Airport | CUZ | Cusco | PE |
| Alfonso Bonilla Aragon International Airport | CLO | Cali | CO |
| Alonso Valderrama Airport | CTD | Chitré | PA |
| Antoine-Simon International Airport | CYA | Les Cayes | HT |
| Antonio José de Sucre Airport | CUM | Cumaná | VE |
| Atlin Airport | — | Atlin | CA |
| Aviador C. Campos Airport | CPC | Chapelco/San Martin de los Andes | AR |
| Avram Iancu Cluj International Airport | CLJ | Cluj-Napoca | RO |
| Bachigualato Federal International Airport | CUL | Culiacán | MX |
| Bandaranaike International Colombo Airport | CMB | Colombo | LK |
| Bartolomeu Lisandro Airport | CAW | Campos dos Goytacazes | BR |
| Béchar Boudghene Ben Ali Lotfi Airport | CBH | Béchar | DZ |
| Benjamin Rivera Noriega Airport | CPX | Culebra | PR |
| Brussels South Charleroi Airport | CRL | Charleroi | BE |
| Buchanan Field | CCR | Concord | US |
| Cà Mau Airport | CAH | Ca Mau City | VN |
| Cabinda Airport | CAB | Cabinda | AO |
| Cabo Frio Airport | CFB | Cabo Frio | BR |
| Cabo San Lucas International Airport | CSW | Cabo San Lucas | MX |
| Caen Carpiquet airport | CFR | Caen | FR |
| Cagliari Elmas Airport | CAG | Cagliari | IT |
| Cairns International Airport | CNS | Cairns | AU |
| Cairo International Airport | CAI | Cairo | EG |
| Calbayog Airport | CYP | Calbayog City | PH |
| Calicut International Airport | CCJ | Calicut | IN |
| Calvi Sainte Catherine Airport | CLY | Calvi | FR |
| Cam Ranh International Airport / Cam Ranh Air Base | CXR | Nha Trang/nha Trang aiurportCam Ranh | VN |
| Camiguin Airport | CGM | Mambajao | PH |
| Camilo Daza International Airport | CUC | Cúcuta | CO |
| Campbeltown Airport | CAL | Campbeltown | GB |
| Campo Grande Airport | CGR | Campo Grande | BR |
| Canaima Airport | CAJ | Canaima | VE |
| Çanakkale Airport | CKZ | Çanakkale | TR |
| Canberra Airport | CBR | Canberra | AU |
| Cancún International Airport | CUN | Cancún | MX |
| Canela Airport | CEL | Canela | BR |
| Cangyuan Washan Airport | CWJ | Lincang (Cangyuan) | CN |
| Canouan Airport | CIW | Canouan | VC |
| Canyonlands Regional Airport | CNY | Moab | US |
| Cap Haitien International Airport | CAP | Cap Haitien | HT |
| Cap Skirring Airport | CSK | Cap Skirring | SN |
| Cape Girardeau Regional Airport | CGI | Cape Girardeau | US |
| Cape Town International Airport | CPT | Cape Town | ZA |
| Capital International Airport | CCE | New Cairo | EG |
| Capitán Aníbal Arab Airport | CIJ | Cobija | BO |
| Capitán FAP José A. Quiñones González International Airport | CIX | Chiclayo | PE |
| Carajás Airport | CKS | Parauapebas | BR |
| Carauari Airport | CAF | Carauari | BR |
| Carcassonne Salvaza Airport | CCF | Carcassonne | FR |
| Cardiff International Airport | CWL | Cardiff | GB |
| Carnarvon Airport | CVQ | Carnarvon | AU |
| Carriel Sur International Airport | CCP | Concepcion | CL |
| Caruaru Airport | CAU | Caruaru | BR |
| Cascais Airport | CAT | Cascais | PT |
| Casper-Natrona County International Airport | CPR | Casper | US |
| Cassidy International Airport | CXI | Kiritimati | KI |
| Castellón-Costa Azahar Airport | CDT | Castellón de la Plana | ES |
| Catania-Fontanarossa Airport | CTA | Catania | IT |
| Catarman National Airport | CRM | Catarman | PH |
| Catumbela Airport | CBT | Catumbela | AO |
| Cauayan Airport | CYZ | Cauayan City | PH |
| Cavern City Air Terminal | CNM | Carlsbad | US |
| Caye Caulker Airport | CUK | Caye Caulker | BZ |
| Caye Chapel Airport | CYC | Caye Chapel | BZ |
| Cayenne – Félix Eboué Airport | CAY | Matoury | GF |
| Cedar City Regional Airport | CDC | Cedar City | US |
| Ceduna Airport | CED | — | AU |
| Center Island Airport | CWS | Center Island | US |
| Central Airport | CEM | Central | US |
| Central Wisconsin Airport | CWA | Mosinee | US |
| Chachapoyas Airport | CHH | Chachapoyas | PE |
| Chadron Municipal Airport | CDR | Chadron | US |
| Chalkyitsik Airport | CIK | Chalkyitsik | US |
| Chambéry Aix les Bains airport | CMF | Chambéry | FR |
| Changchun Longjia International Airport | CGQ | Changchun | CN |
| Changde Taohuayuan Airport | CGD | Changde (Dingcheng) | CN |
| Changhai Dachangshandao Airport | CNI | Dalian (Changhai) | CN |
| Changsha Huanghua International Airport | CSX | Changsha (Changsha) | CN |
| Changuinola Captain Manuel Niño International Airport | CHX | Changuinola | PA |
| Changzhi Wangcun Airport | CIH | Changzhi | CN |
| Changzhou Benniu International Airport | CZX | Changzhou | CN |
| Chania International Airport | CHQ | Souda | GR |
| Chaoyang Airport | CHG | Shuangta, Chaoyang | CN |
| Charles de Gaulle International Airport | CDG | Paris (Roissy-en-France, Val-d'Oise) | FR |
| Charles Kirkconnell International Airport | CYB | West End | KY |
| Charleston International Airport | CHS | Charleston | US |
| Charleville Airport | CTL | Charleville | AU |
| Charlotte Douglas International Airport | CLT | Charlotte | US |
| Charlottesville Albemarle Airport | CHO | Charlottesville | US |
| Chattanooga Metropolitan Airport (Lovell Field) | CHA | Chattanooga | US |
| Cheboksary Airport | CSY | Cheboksary | RU |
| Chefornak Airport | CYF | Chefornak | US |
| Chengde Puning Airport | CDE | Chengde | CN |
| Chengdu Shuangliu International Airport | CTU | Chengdu (Shuangliu) | CN |
| Cheongju International Airport/Cheongju Air Base (K-59/G-513) | CJJ | Cheongju | KR |
| Cherepovets Airport | CEE | Cherepovets | RU |
| Chernivtsi International Airport | CWC | Chernivtsi | UA |
| Cherskiy Airport | CYX | Cherskiy | RU |
| Chetumal International Airport | CTM | Chetumal | MX |
| Cheyenne Regional Jerry Olson Field | CYS | Cheyenne | US |
| Chiang Mai International Airport | CNX | Chiang Mai | TH |
| Chiayi Airport | CYI | Shuishang | TW |
| Chicken Airport | CKX | Chicken | US |
| Chifeng Yulong Airport | CIF | Chifeng | CN |
| Chimbu Airport | CMU | Kundiawa | PG |
| Chimore Airport | CCA | Chimore | BO |
| Chippewa County International Airport | CIU | Kincheloe | US |
| Chitral Airport | CJL | Chitral | PK |
| Chlef Aboubakr Belkaid International Airport | CFK | Chlef | DZ |
| Choibalsan Airport | COQ | — | MN |
| Choiseul Bay Airport | CHY | Choiseul Bay | SB |
| Chokurdakh Airport | CKH | Chokurdah | RU |
| Chongqing Jiangbei International Airport | CKG | Chongqing | CN |
| Chongqing Xiannüshan Airport | CQW | Wulong | CN |
| Christchurch International Airport | CHC | Christchurch | NZ |
| Christmas Creek Airport | CKW | Christmas Creek Mine | AU |
| Chuathbaluk Airport | CHU | Chuathbaluk | US |
| Chub Cay Airport | CCZ | Chub Cay | BS |
| Chumphon Airport | CJM | Chumphon | TH |
| Ciampino–G. B. Pastine International Airport | CIA | Rome | IT |
| Cincinnati Northern Kentucky International Airport | CVG | Cincinnati / Covington | US |
| City of Colorado Springs Municipal Airport | COS | Colorado Springs | US |
| Ciudad Constitución National Airport | CUA | Comondú | MX |
| Ciudad del Carmen International Airport | CME | Ciudad del Carmen | MX |
| Ciudad Obregón International Airport | CEN | Ciudad Obregón | MX |
| Clark International Airport / Clark Air Base | CRK | Mabalacat | PH |
| Clarks Point Airport | CLP | Clarks Point | US |
| Clermont-Ferrand Auvergne airport | CFE | Clermont-Ferrand | FR |
| Cleveland Hopkins International Airport | CLE | Cleveland | US |
| Cloncurry Airport | CNJ | Cloncurry | AU |
| Clovis Municipal Airport | CVN | Clovis | US |
| Cobar Airport | CAZ | — | AU |
| Cochin International Airport | COK | Kochi | IN |
| Coconut Island Airport | CNC | — | AU |
| Cocos (Keeling) Islands Airport | CCK | West Island | CC |
| Coen Airport | CUQ | Coen | AU |
| Coffs Harbour Airport | CFS | Coffs Harbour | AU |
| Coimbatore International Airport | CJB | Coimbatore | IN |
| Cold Bay Airport | CDB | Cold Bay | US |
| Coll Airport | COL | Coll Island | GB |
| Cologne Bonn Airport | CGN | Köln (Cologne) | DE |
| Colonel Hill Airport | CRI | Colonel Hill | BS |
| Colonsay Airstrip | CSA | Colonsay | GB |
| Columbia Metropolitan Airport | CAE | Columbia | US |
| Columbia Regional Airport | COU | Columbia | US |
| Columbus Airport | CSG | Columbus | US |
| Comiso Airport | CIY | Comiso | IT |
| Congonhas–Deputado Freitas Nobre Airport | CGH | São Paulo | BR |
| Coober Pedy Airport | CPD | Coober Pedy | AU |
| Cooktown Airport | CTN | — | AU |
| Coonamble Airport | CNB | — | AU |
| Copenhagen Kastrup Airport | CPH | Copenhagen | DK |
| Corfu Ioannis Kapodistrias International Airport | CFU | Kerkyra (Corfu) | GR |
| Coronel Adalberto Mendes da Silva Airport | CAC | Cascavel | BR |
| Coronel Felipe Varela International Airport | CTC | Catamarca | AR |
| Corozal Airport | CZH | Corozal | BZ |
| Corpus Christi International Airport | CRP | Corpus Christi | US |
| Corrientes Airport | CNQ | Corrientes | AR |
| Cortez Municipal Airport | CEZ | Cortez | US |
| Corumbá International Airport | CMG | Corumbá | BR |
| Corvo Airport | CVU | Corvo | PT |
| Cotabato (Awang) Airport | CBO | Datu Odin Sinsuat | PH |
| Cotonou Cadjehoun International Airport | COO | Cotonou | BJ |
| Cox's Bazar Airport | CXB | Cox's Bazar | BD |
| Cozumel International Airport | CZM | Cozumel | MX |
| Craig Cove Airport | CCV | Craig Cove | VU |
| Craiova International Airport | CRA | Craiova | RO |
| Crooked Creek Airport | CKD | Crooked Creek | US |
| Crotone Sant'Anna Pythagoras Airport | CRV | Isola di Capo Rizzuto (KR) | IT |
| Cruzeiro do Sul Airport | CZS | Cruzeiro Do Sul | BR |
| Çukurova International Airport | COV | Tarsus | TR |
| Cuneo International Airport | CUF | Levaldigi (CN) | IT |
| Cunnamulla Airport | CMA | — | AU |
| Curitiba-Afonso Pena International Airport | CWB | Curitiba | BR |
| Cuyo Airport | CYU | Cuyo | PH |
| Desierto de Atacama Airport | CPO | Copiapo | CL |
| Donegal Airport | CFN | Donegal | IE |
| Easterwood Field | CLL | College Station | US |
| El Loa Airport | CJC | Calama | CL |
| FAP Lieutenant Jaime Andres de Montreuil Morales Airport | CHM | Chimbote | PE |
| Fort Ware Airport | — | Fort Ware | CA |
| General Enrique Mosconi International Airport | CRD | Comodoro Rivadavia | AR |
| General Francisco Bermúdez Airport | CUP | Carúpano | VE |
| General Pedro Jose Mendez International Airport | CVM | Ciudad Victoria | MX |
| General Roberto Fierro Villalobos International Airport | CUU | Chihuahua | MX |
| Gods Lake Airport | — | Gods Lake | CA |
| Guangzhou Baiyun International Airport | CAN | Guangzhou (Huadu) | CN |
| Hato International Airport | CUR | Willemstad | CW |
| Houghton County Memorial Airport | CMX | Hancock | US |
| Hugo Cantergiani Regional Airport | CXJ | Caxias Do Sul | BR |
| Ignacio Agramonte International Airport | CMW | Camaguey | CU |
| Ingeniero Aeronáutico Ambrosio L.V. Taravella International Airport | COR | Cordoba | AR |
| Ingeniero Alberto Acuña Ongay International Airport | CPE | Campeche | MX |
| Inia William Tuuta Memorial Airport | CHT | Te One | NZ |
| Jack Mc Namara Field Airport | CEC | Crescent City | US |
| Jaime Gonzalez Airport | CFG | Cienfuegos | CU |
| Jardines Del Rey Airport | CCC | Cayo Coco | CU |
| Jeju International Airport | CJU | Jeju City | KR |
| John Glenn Columbus International Airport | CMH | Columbus | US |
| Jorge Wilsterman International Airport | CBB | Cochabamba | BO |
| José Leonardo Chirinos Airport | CZE | Coro | VE |
| Kadapa Airport | CDP | Kadapa | IN |
| Kannur International Airport | CNN | Kannur | IN |
| Kurchatov Chelyabinsk International Airport | CEK | Chelyabinsk | RU |
| Lac du Bonnet Airport | — | Lac du Bonnet | CA |
| Laguindingan International Airport | CGY | Laguindingan | PH |
| Las Brujas Airport | CZU | Corozal | CO |
| Lauriston Airport | CRU | Carriacou Island | GD |
| Licenciado Miguel de la Madrid International Airport | CLQ | Colima | MX |
| Mackenzie Airport | — | Mackenzie | CA |
| Mactan Cebu International Airport | CEB | Cebu City/Lapu-Lapu City | PH |
| Mae Fah Luang - Chiang Rai International Airport | CEI | Chiang Rai | TH |
| Maiquetía Simón Bolívar International Airport | CCS | Maiquetía | VE |
| Margaret Ekpo International Airport | CBQ | Calabar | NG |
| Mariscal Lamar Airport | CUE | Cuenca | EC |
| Mayor General FAP Armando Revoredo Iglesias Airport | CJA | Cajamarca | PE |
| McClellan-Palomar Airport | CLD | Carlsbad | US |
| Merle K (Mudhole) Smith Airport | CDV | Cordova | US |
| Mihail Kogălniceanu International Airport | CND | Constanța | RO |
| Mohamed Boudiaf International Airport | CZL | Constantine | DZ |
| Mohammed V International Airport | CMN | Casablanca | MA |
| Neerlerit Inaat Airport | CNP | Neerlerit Inaat | GL |
| Nelson Ribeiro Guimarães Airport | CLV | Caldas Novas | BR |
| Netaji Subhash Chandra Bose International Airport | CCU | Kolkata | IN |
| New Chitose Airport | CTS | Sapporo | JP |
| North Central West Virginia Airport | CKB | Bridgeport | US |
| Nusawiru Airport | CJN | Cijulang | ID |
| Ospika Airport | — | Ospika | CA |
| Pedro Vieira Moreira Airport | CJZ | Cajazeiras | BR |
| Pelee Island Airport | — | Pelee Island | CA |
| Pitt Meadows Regional Airport | — | Pitt Meadows | CA |
| Presidente João Suassuna Airport | CPV | Campina Grande | BR |
| Rafael Nuñez International Airport | CTG | Cartagena | CO |
| Shah Amanat International Airport | CGP | Chattogram (Chittagong) | BD |
| Shymkent International Airport | CIT | Shymkent | KZ |
| Slate Falls Airport | — | Slate Falls | CA |
| Soekarno-Hatta International Airport | CGK | Jakarta | ID |
| Solovki Airport | CSH | Solovetsky Islands | RU |
| Streatham Reef Hueston Airfield | — | Streatham | CA |
| Tancredo Neves International Airport | CNF | Belo Horizonte | BR |
| The Eastern Iowa Airport | CID | Cedar Rapids | US |
| Tsay Keh Airport | — | Tsay Keh | CA |
| Tunggul Wulung Airport | CXP | Cilacap | ID |
| Türkmenabat International Airport | CRZ | Türkmenabat | TM |
| University of Illinois Willard Airport | CMI | Savoy | US |
| Várzea Grande–Marechal Rondon International Airport | CGB | Cuiabá | BR |
| Vilo Acuña International Airport | CYO | Cayo Largo del Sur | CU |
| Winnipeg / St. Andrews Airport | — | Winnipeg/Saint Andrews | CA |
| Yakataga Airport | CYT | Yakataga | US |
| Yeager Airport | CRW | Charleston | US |
| Yellowstone Regional Airport | COD | Cody | US |
| Zhengzhou Xinzheng International Airport | CGO | Zhengzhou | CN |