| CAA | aeropuerto El aguacate (Catacamas) Airport | La Ceiba |  Honduras |
| CAB | Cabinda Airport | Cabinda |  Angola |
| CAC | Cascavel Airport | Cascavel |  Brazil |
| CAD | Cadillac Airport | Traverse City |  United States of America |
| CAE | Columbia Metropolitan Airport | Columbia | United States of America |
| CAF | Carauari Airport | Tefe | Brazil |
| CAG | Elmas Airport | Cagliari |  Italy |
| CAH | Ca Mau Airport | Kamau |  Viet Nam |
| CAI | Cairo International Airport | Cairo |  Egypt |
| CAJ | Canaima Airport | Puerto Ordaz |  Venezuela (Bolivarian Republic of) |
| CAK | Akron/canton Regional | Akron | United States of America |
| CAL | Machrihanish Airport | Campbeltown |  United Kingdom of Great Britain and Northern Ireland |
| CAM | Camiri Airport | Tarija |  Bolivia (Plurinational State of) |
| CAN | Baiyun Airport | Guangzhou |  China |
| CAO | Clayton Airport | Amarillo | United States of America |
| CAP | Cap Haitien Airport | Cap Haitien |  Haiti |
| CAQ | Caucasia Airport | Monteria |  Colombia |
| CAR | Municipal Airport | Presque Isle | United States of America |
| CAS | Anfa Airport | Casablanca |  Morocco |
| CAT | New Bight Airport | Tires |  Bahamas |
| CAU | Caruaru Airport | Campina Grande | Brazil |
| CAV | Cazombo Airport | Catumbela | Angola |
| CAW | Bartolomeu Lisandro Airport | Campos | Brazil |
| CAX | Carlisle Airport | Edinburgh | United Kingdom of Great Britain and Northern Ireland |
| CAY | Rochambeau Airport | Cayenne |  French Guiana |
| CAZ | Cobar Airport | Griffith |  Australia |
| CBA | Corner Bay Airport | Tenakee Springs | United States of America |
| CBB | J Wilsterman Airport | Cochabamba | Bolivia (Plurinational State of) |
| CBC | Cherrabun Airport | Broome | Australia |
| CBD | Car Nicobar Airport | Port Blair |  India |
| CBE | Greater Cumberland Regional Airport | Johnstown | United States of America |
| CBF | Council Bluffs Municipal Airport | Omaha | United States of America |
| CBG | Cambridge Airport | Cambridge | United Kingdom of Great Britain and Northern Ireland |
| CBH | Leger Airport | Tlemcen |  Algeria |
| CBI | Cape Barren Island Airport | Flinders Island | Australia |
| CBJ | Cabo Rojo Airport | Santo Domingo |  Dominican Republic |
| CBK | Colby Municipal Airpor Airport | McCook | United States of America |
| CBL | Ciudad Bolivar Airport | Puerto Ordaz | Venezuela (Bolivarian Republic of) |
| CBM | Columbus AFB | Columbus | United States of America |
| CBN | Penggung Airport | Bandung |  Indonesia |
| CBO | Awang Airport | Cotabato |  Philippines |
| CBP | Coimbra Airport | Viseu |  Portugal |
| CBQ | Calabar Airport | Calabar |  Nigeria |
| CBR | Canberra Airport | Canberra | Australia |
| CBS | Oro Negro Airport | Maracaibo | Venezuela (Bolivarian Republic of) |
| CBT | Aeroporto da Catumbela Airport | Catumbela | Angola |
| CBU | Cottbus Airport | Dresden |  Germany |
| CBV | Coban Airport | Guatemala City |  Guatemala |
| CBW | Aeroporto de Campo Mourao. SSKM Airport | Maringa | Brazil |
| CBX | Condobolin Airport | Parkes | Australia |
| CBY | Canobie Airport | Cloncurry | Australia |
| CBZ | Cabin Creek Airport | Hydaburg | United States of America |
| CCB | Cable Airport | Ontario | United States of America |
| CCC | Aeropuerto Internacional de Jardines del Rey Airpo | Cayo Coco |  Cuba |
| CCF | Salvaza Airport | Carcassonne |  France |
| CCG | Crane County Airport | Midland | United States of America |
| CCH | Chile Chico Airport | Balmaceda |  Chile |
| CCI | Concordia Airport | Chapeco | Brazil |
| CCJ | Kozhikode Airport | Kozhikode | India |
| CCK | Cocos Islands Airport | Cocos Islands | Australia |
| CCL | Chinchilla Airport | Roma | Australia |
| CCM | Criciuma Airport | Lages | Brazil |
| CCN | Chakcharan Airport | Mazar-I-Sharif |  Afghanistan |
| CCO | Carimagua Airport | El Yopal | Colombia |
| CCP | Carriel Sur Airport | Concepcion | Chile |
| CCQ | Cachoeira Airport | Salvador | Brazil |
| CCR | Buchanan Field Airport | Concord | United States of America |
| CCS | Simon Bolivar International Airport | Caracas | Venezuela (Bolivarian Republic of) |
| CCT | Colonia Catriel Airport | Neuquen |  Argentina |
| CCU | Netaji Subhas Chandra Airport | Kolkata | India |
| CCV | Craig Cove Airport | Norsup |  Vanuatu |
| CCW | Cowell Airport | Whyalla | Australia |
| CCX | Caceres Airport | Cuiaba | Brazil |
| CCY | Northeast Iowa Regional Arprt-Ccy Airport | Waterloo | United States of America |
| CCZ | Chub Cay Airport | Nassau | Bahamas |
| CDA | Cooinda Airport | Darwin | Australia |
| CDB | Cold Bay Airport | Cold Bay | United States of America |
| CDC | Cedar City Airport | Cedar City | United States of America |
| CDD | Cauquira Airport | Roatan | Honduras |
| CDE | Chengde Puning Airport | Chifeng | China |
| CDG | Charles De Gaulle Airport | Paris | France |
| CDH | Harrell Field Airport | El Dorado | United States of America |
| CDI | Cachoeiro Itapemirim Airport | Campos | Brazil |
| CDJ | Conceicao Do Araguaia Airport | Araguaina | Brazil |
| CDK | George T. Lewis Airport | Gainesville | United States of America |
| CDL | Candle Airport | Buckland | United States of America |
| CDN | Woodward Field Airport | Columbia | United States of America |
| CDO | Cradock Airport | Port Elizabeth |  South Africa |
| CDP | Cuddapah Airport | Tirupati | India |
| CDQ | Croydon Airport | Normanton | Australia |
| CDR | Chadron Airport | Chadron | United States of America |
| CDS | Childress Airport | Amarillo | United States of America |
| CDU | Camden Airport | Sydney | United States of America |
| CDV | Merle K (Mudhole) Smith Airport | Cordova | United States of America |
| CDW | Caldwell Wright Airport | Morristown | United States of America |
| CDY | Cagayan De Sulu Airport | Puerto Princesa | Philippines |
| CDZ | Cadiz Airport | Cadiz |  Spain |
| CEA | Cessna Aircraft Field | Wichita | United States of America |
| CEB | Mactan-Cebu International Airport | Cebu City | Philippines |
| CEC | Mc Namara Field Airport | Crescent City | United States of America |
| CED | Ceduna Airport | Ceduna | Australia |
| CEE | Cherepovets Airport | Cherepovets |  Russian Federation |
| CEF | Westover ARB/Metropolitan Airport | Hartford | United States of America |
| CEG | Hawarden Airport | Chester | United Kingdom of Great Britain and Northern Ireland |
| CEH | Chelinda Airport | Lilongwe |  Malawi |
| CEI | Chiang Rai Airport | Chiang Rai |  Thailand |
| CEJ | Chernigov Airport | Kiev |  Ukraine |
| CEK | Chelyabinsk Airport | Chelyabinsk | Russian Federation |
| CEL | Cape Eleuthera Airport | Rock Sound | Bahamas |
| CEM | Central Airport | Fort Yukon | United States of America |
| CEN | Ciudad Obregon Airport | Ciudad Obregon |  Mexico |
| CEO | Waco Kungo Airport | Catumbela | Angola |
| CEP | Concepcion Airport | Calama | Chile |
| CEQ | Aeroport Cannes Mandelieu Airport | Cannes | France |
| CER | Maupertus Airport | Caen | France |
| CES | Cessnock Airport | Newcastle | Australia |
| CET | Le Pontreau Airport | Angers | France |
| CEU | Oconee County Airport | Greenville | United States of America |
| CEV | Mettle Field Airport | Cincinnati | United States of America |
| CEW | Bob Sikes Airport | Fort Walton Beach | United States of America |
| CEX | Chena Hot Springs Airport | Fairbanks | United States of America |
| CEY | Calloway County Airport | Paducah | United States of America |
| CEZ | Montezuma County Airport | Cortez | United States of America |
| CFA | Coffee Point Airport | Egegik | United States of America |
| CFB | Cabo Frio Airport | Cabo Frio | Brazil |
| CFC | Cacador Airport | Lages | Brazil |
| CFD | Coulter Field Airport | College Station | United States of America |
| CFE | Clermont/Ferrand Auvergne International (Aulnat) A | Clermont-Ferrand | France |
| CFF | Cafunfo Airport | Luanda | Angola |
| CFG | Cienfuegos Airport | Cienfuegos | Cuba |
| CFH | Clifton Hills Airport | Olympic Dam | Australia |
| CFI | Camfield Airport | Kununurra | Australia |
| CFK | Chefornak Airport | Chlef | United States of America |
| CFN | Donegal Airport | Donegal |  Ireland |
| CFO | Confreza Airport | Palmas | Brazil |
| CFP | Carpentaria Downs Airport | Cairns | Australia |
| CFQ | Creston Valley Airport | Cranbrook |  Canada |
| CFR | Aeroport de Caen-Carpiquet Airport | Caen | France |
| CFS | Coffs Harbour Airport | Coffs Harbour | Australia |
| CFT | Morenci Airport | Silver City | United States of America |
| CFU | Ioannis Kapodistrias Airport | Kerkyra |  Greece |
| CFV | Coffeyville Municipal Airport | Tulsa | United States of America |
| CGA | Craig SPB Airport | Klawock | United States of America |
| CGB | International Airport Marechal Rondon | Cuiaba | Brazil |
| CGC | Cape Gloucester Airport | Hoskins |  Papua New Guinea |
| CGD | Changde Airport | Changde | China |
| CGE | Cambridge-dorchester Airport | Salisbury-Ocean City | United Kingdom of Great Britain and Northern Ireland |
| CGF | Cuyahoga County | Cleveland | United States of America |
| CGG | Casiguran | Cauayan | Philippines |
| CGH | Congonhas International Airport | Sao Paulo | Brazil |
| CGI | Cape Girardeau Airport | Cape Girardeau | United States of America |
| CGJ | Kasompe Airport | Ndola |  Zambia |
| CGK | Soekarno-Hatta International Airport | Jakarta | Indonesia |
| CGM | Camiguin Airport | Butuan | Philippines |
| CGN | Cologne/bonn Airport | Cologne | Germany |
| CGO | Zhengzhou Airport | Zhengzhou | China |
| CGP | Patenga Airport | Chittagong |  Bangladesh |
| CGQ | Changchun Airport | Changchun | China |
| CGR | International Airport Campo Grande | Campo Grande | Brazil |
| CGS | College Park Airport | Washington | United States of America |
| CGT | Chinguitti Airport | Nouakchott |  Mauritania |
| CGU | Ciudad Guayana Airport | Puerto Ordaz | Venezuela (Bolivarian Republic of) |
| CGV | Caiguna Airport | Esperance | Australia |
| CGX | Merrill C Meigs | Chicago | United States of America |
| CGY | Cagayan De Oro Domestic Airport | Cagayan De Oro | Philippines |
| CGZ | Casa Grande Municipal Airport | Phoenix | United States of America |
| CHA | Lovell Field Airport | Chattanooga | United States of America |
| CHB | Chilas Airport | Gilgit |  Pakistan |
| CHC | Christchurch International Airport | Christchurch |  New Zealand |
| CHD | Williams Gateway Airport | Phoenix | United States of America |
| CHE | Reenroe Airport | Kerry County | Ireland |
| CHF | Jinhae Airport | Busan |  Korea (Republic of) |
| CHG | Chaoyang Airport | Chaoyang | China |
| CHH | Chachapoyas Airport | Cajamarca |  Peru |
| CHJ | Chipinge Airport | Harare |  Zimbabwe |
| CHK | Chickasha Municipal Airport | Oklahoma City | United States of America |
| CHL | Challis Airport | Sun Valley | United States of America |
| CHM | Chimbote Airport | Trujillo | Peru |
| CHN | Jeonju Airport | Gunsan | Korea (Republic of) |
| CHO | Albemarle Airport | Charlottesville | United States of America |
| CHP | Circle Hot Springs Airport | Fort Yukon | United States of America |
| CHQ | Souda Airport | Chania | Greece |
| CHR | Chateauroux Airport | Limoges | France |
| CHS | Charleston International Airport / Charleston Air Force Base | Charleston | United States of America |
| CHT | Karewa Airport | Nuku'alofa | New Zealand |
| CHU | Chuathbaluk Airport | Chuathbaluk | United States of America |
| CHV | Chaves Airport | Vila Real | Portugal |
| CHW | Jiuhuang Airport | Jiayuguan | China |
| CHX | Changuinola Airport | David |  Panama |
| CHY | Choiseul Bay Airport | Choiseul Bay |  Solomon Islands |
| CHZ | State Airport | Klamath Falls | United States of America |
| CIA | Ciampino Airport | Rome | United States of America |
| CIB | Ap In The Sky | Long Beach | United States of America |
| CIC | Chico Airport | Chico | United States of America |
| CID | Eastern Iowa Airport | Cedar Rapids | United States of America |
| CIE | Collie Airport | Perth | Australia |
| CIF | Chifeng Airport | Chifeng | China |
| CIG | Craig-Moffat Airport | Hayden | United States of America |
| CIH | Changzhi Airport | Changzhi | China |
| CIJ | Capitan Anibal Arab Airport | Cobija | Bolivia (Plurinational State of) |
| CIK | Chalkyitsik Airport | Fort Yukon | United States of America |
| CIL | Melsing Creek Airport | White Mountain | United States of America |
| CIM | Cimitarra Airport | Barrancabermeja | Colombia |
| CIN | Carroll Airport | Fort Dodge | United States of America |
| CIO | MCAL Lopez Airport | Villavicencio | Chile |
| CIP | Chipata Airport | Kasama | Zambia |
| CIQ | Chiquimula Airport | Guatemala City | Guatemala |
| CIR | Cairo Airport | Cape Girardeau | Egypt |
| CIS | Canton Island Airport | Wallis Island |  Kiribati |
| CIT | Shimkent Airport | Shymkent |  Kazakhstan |
| CIV | Chomley Airport | Ketchikan | United States of America |
| CIW | Canouan Island Airport | Saint Vincent |  Saint Vincent and the Grenadines |
| CIX | Cornel Ruiz Airport | Chiclayo | Peru |
| CIY | Comiso Airport | Comiso | Italy |
| CIZ | Coari Airport | Tefe | Brazil |
| CJA | Cajamarca Airport | Cajamarca | Peru |
| CJB | Peelamedu Airport | Coimbatore | India |
| CJC | El Loa Airport | Calama | Chile |
| CJD | Candilejas Airport | Florencia | Colombia |
| CJH | Chilko Lake Airport | Campbell River | Canada |
| CJJ | Cheongju | Cheongju | Korea (Republic of) |
| CJL | Chitral Airport | Peshawar | Pakistan |
| CJM | Chumphon Airport | Chumphon | Thailand |
| CJN | Gillespie Field Airport | San Diego | United States of America |
| CJS | Abraham Gonzalez International Airport | Ciudad Juarez | Mexico |
| CJT | Copalar Airport | Tuxtla Gutierrez | Mexico |
| CJU | Jeju Airport | Jeju | Korea (Republic of) |
| CKA | Kegelman Af Airport | Stillwater | United States of America |
| CKB | Benedum Airport | Clarksburg | United States of America |
| CKC | Cherkassy Airport | Kiev | Ukraine |
| CKD | Crooked Creek Airport | Chuathbaluk | United States of America |
| CKE | Clear Lake Airport | Fort Wayne | United States of America |
| CKG | Chongqing Jiangbei International Airport | Chongqing | China |
| CKH | Chokurdah Airport | Chokurdah | Russian Federation |
| CKI | Croker Island Airport | Maningrida | Australia |
| CKK | Cherokee Airport | Stillwater | United States of America |
| CKL | Chkalovsky Airport | Moscow | Russian Federation |
| CKM | Fletcher Field Airport | Greenville | United States of America |
| CKN | Municipal Airport | Thief River Falls | United States of America |
| CKO | Cornelio Procopio Airport | Londrina | Brazil |
| CKR | Crane Island Airport | Friday Harbor | United States of America |
| CKS | Carajas Airport | Carajas | Brazil |
| CKT | Sarakhs Airport | Tehran |  Iran (Islamic Republic of) |
| CKU | Cordova Municipal Airport | Cordova | United States of America |
| CKV | Outlaw Field Airport | Nashville | United States of America |
| CKX | Chicken Airport | Fort Yukon | United States of America |
| CKY | Conakry Airport | Conakry |  Guinea |
| CKZ | Canakkale Airport | Canakkale |  Turkey |
| CLA | Comilla Airport | Dhaka | Bangladesh |
| CLB | Castlebar Airport | Knock | Ireland |
| CLC | Metroport Airport | Houston | United States of America |
| CLD | Mc Clellan-Palomar Airport | San Diego | United States of America |
| CLE | Cleveland Hopkins International Airport | Cleveland | United States of America |
| CLG | Coalinga Airport | Fresno | United States of America |
| CLH | Coolah Airport | Dubbo | Australia |
| CLI | Clintonville Airport | Appleton | United States of America |
| CLJ | Cluj Napoca International Airport | Cluj |  Romania |
| CLK | Clinton Regional Airport | Lawton | United States of America |
| CLL | Easterwood Field Airport | College Station | United States of America |
| CLM | Fairchild International Airport | Friday Harbor | United States of America |
| CLN | Carolina Airport | Araguaina | Brazil |
| CLO | Alfonso B. Aragon Airport | Cali | Colombia |
| CLP | Clarks Point Airport | Dillingham | United States of America |
| CLQ | Colima Airport | Colima | Mexico |
| CLR | Calipatria Airport | Imperial | United States of America |
| CLS | Centralia Airport | Seattle | United States of America |
| CLT | Charlotte Douglas Airport | Charlotte | United States of America |
| CLU | Columbus Municipal Airport | Indianapolis | United States of America |
| CLV | Caldas Novas Airport | Uberlandia | Brazil |
| CLW | Clearwater Air Park | Tampa | United States of America |
| CLX | Clorinda Airport | Formosa | Argentina |
| CLY | Ste Catherine Airport | Calvi | France |
| CLZ | Calabozo Airport | Valencia | Venezuela (Bolivarian Republic of) |
| CMA | Cunnamulla Airport | Charleville | Australia |
| CMB | Bandaranayake Airport | Colombo |  Sri Lanka |
| CMC | Camocim Airport | Fortaleza | Brazil |
| CMD | Cootamundra Airport | Wagga Wagga | Australia |
| CME | Ciudad Del Carmen Airport | Ciudad Del Carmen | Mexico |
| CMF | Chambery Airport | Lyon | France |
| CMG | International Airport Corumba | Corumba | Brazil |
| CMH | John Glenn Columbus International Airport | Columbus | United States of America |
| CMI | University Of Illinois Willard Airport | Champaign | United States of America |
| CMJ | Chi Mei Airport | Makung |  Taiwan, Province of China |
| CMK | Club Makokola Airport | Blantyre | Malawi |
| CML | Camooweal Airport | Mount Isa | Australia |
| CMM | Carmelita Airport | Flores | Guatemala |
| CMN | Casablanca Mohammed V International Airport | Casablanca | Morocco |
| CMO | Obbia Airport | Mogadishu |  Somalia |
| CMP | Campo Alegre Airport | Palmas | Brazil |
| CMQ | Clermont Airport | Moranbah | Australia |
| CMR | Colmar-houssen Airport | Strasbourg | France |
| CMS | Scusciuban Airport | Hargeisa | Somalia |
| CMT | Cameta Airport | Belem | Brazil |
| CMU | Chimbu Airport | Goroka | Papua New Guinea |
| CMV | Coromandel Airport | Auckland | New Zealand |
| CMW | Ign Agramonte International Airport | Camaguey | Cuba |
| CMX | Houghton County Airport | Hancock | United States of America |
| CMY | Fort Mccoy Airport | La Crosse | United States of America |
| CMZ | Caia Airport | Maputo |  Mozambique |
| CNA | Cananea Airport | Hermosillo | Mexico |
| CNB | Coonamble Airport | Dubbo | Australia |
| CNC | Coconut Island Airport | Horn Island | Australia |
| CND | Kogalniceanu Airport | Constanta | Romania |
| CNE | Canon City Airport | Colorado Springs | United States of America |
| CNF | Tancredo Neves International Airport | Belo Horizonte | Brazil |
| CNG | Parvaud Airport | Bordeaux | France |
| CNH | Claremont Municipal Airport | Lebanon | United States of America |
| CNI | Changhai Airport | Dalian | China |
| CNJ | Cloncurry Airport | Cloncurry | Australia |
| CNK | Blosser Municipal Airport | Salina | Brazil |
| CNL | Sindal Airport | Aalborg |  Denmark |
| CNM | Cavern City Air Terminal Airport | Carlsbad | United States of America |
| CNN | Chulman Airport | Neryungri | Russian Federation |
| CNO | Chino Airport | Ontario | United States of America |
| CNP | Neerlerit Inaat Airport | Neerlerit Inaat |  Greenland |
| CNQ | Camba Punta Airport | Corrientes | Argentina |
| CNR | Chanaral Airport | Copiapo | Chile |
| CNS | Cairns Airport | Cairns | Australia |
| CNT | Charata Airport | Resistencia | Argentina |
| CNU | Martin Johnson Airport | Joplin | United States of America |
| CNV | Canavieiras Airport | Porto Seguro | Brazil |
| CNW | TSTC Waco Airport | Waco | United States of America |
| CNX | Chiang Mai International Airport | Chiang Mai | Thailand |
| CNY | Canyonlands Field Airport | Moab | United States of America |
| CNZ | Cangamba Airport | Lubango | Angola |
| COA | Columbia Airport | Modesto | United States of America |
| COB | Coolibah Airport | Kununurra | Australia |
| COC | Concordia Airport | Uruguaiana | Brazil |
| COD | Yellowstone Regional Airport | Cody | United States of America |
| COF | Patrick AFB | Melbourne | United States of America |
| COG | Mandinga Airport | Quibdo | Colombia |
| COH | Cooch Behar Airport | Bagdogra | India |
| COI | Merritt Island Airport | Melbourne | United States of America |
| COJ | Coonabarabran Airport | Dubbo | Australia |
| COK | Cochin International Airport | Kochi | India |
| COL | Isle Of Coll Airport | Tiree, Inner Hebrides | United Kingdom of Great Britain and Northern Ireland |
| COM | Coleman Municipal Airport | Abilene | United States of America |
| CON | Concord Municipal Airport | Manchester | United States of America |
| COO | Cotonou Airport | Cotonou |  Benin |
| COP | Cooperstown - Westville Airport | Albany | United States of America |
| COQ | Choibalsan Airport | Ulaanbaatar |  Mongolia |
| COR | Pajas Blancas Airport | Cordoba | Argentina |
| COS | Colorado Springs Airport | Colorado Springs | United States of America |
| COT | Cotulla Airport | Laredo | United States of America |
| COU | Columbia Regional Airport | Columbia | United States of America |
| COV | Covilha Airport | Viseu | Portugal |
| COW | Coquimbo Airport | La Serena | Chile |
| COX | Congo Town Airport | Nassau | Bahamas |
| COY | Coolawanyah Airport | Paraburdoo | Australia |
| COZ | Constanza Airport | Santiago | Dominican Republic |
| CPA | A. Tubman Airport | Monrovia |  Liberia |
| CPB | Capurgana Airport | Apartado | Colombia |
| CPC | Chapelco Airport | San Martin De Los Andes | Argentina |
| CPD | Coober Pedy Airport | Coober Pedy | Australia |
| CPE | Campeche International Airport | Campeche | Mexico |
| CPF | Ngloram Airport | Surakarta | Indonesia |
| CPG | Carmen De Patagones Airport | Viedma | Argentina |
| CPH | Kobenhavns Lufthavn Kastrup Airport | Copenhagen | Denmark |
| CPI | Cape Orford Airport | Rio Grande | Papua New Guinea |
| CPL | General Navas Pardo (Chaparral) Airport | Ibague | Colombia |
| CPM | Compton Airport | Long Beach | United States of America |
| CPN | Cape Rodney Airport | Popondetta | Papua New Guinea |
| CPO | Chamonate Airport | Copiapo | Chile |
| CPQ | Aeroporto Campo dos Amarais Airport | Sao Paulo | Brazil |
| CPR | Natrona County International Airport | Casper | United States of America |
| CPS | St. Louis Downtown Airport | Saint Louis | United States of America |
| CPT | Cape Town International Airport | Cape Town | South Africa |
| CPU | Cururupu Airport | Sao Luiz | Brazil |
| CPV | Joao Suassuna Airport | Campina Grande | Brazil |
| CPX | Culebra Airport | Culebra |  Puerto Rico |
| CQA | Canarana Airport | Sinop | Brazil |
| CQD | Shahre-kord Airport | Isfahan | Iran (Islamic Republic of) |
| CQF | Calais Airport | Calais | France |
| CQM | Ciudad Real Central Airport | Ciudad Real | Spain |
| CQP | Cape Flattery Airport | Cooktown | Australia |
| CQS | Costa Marques Airport | Ji-Parana | Brazil |
| CQT | Caquetania Airport | Florencia | Colombia |
| CRA | Craiova Airport | Craiova | Romania |
| CRB | Collarenebri Airport | Moree | Australia |
| CRC | Cartago Airport | Pereira | Colombia |
| CRD | Comodoro Rivadavia Airport | Comodoro Rivadavia | Argentina |
| CRE | Grand Strand Airport | Myrtle Beach | United States of America |
| CRF | Carnot Airport | Bangui |  Central African Republic |
| CRG | Jacksonville Executive at Craig Airport | Jacksonville | United States of America |
| CRH | Cherribah Airport | Brisbane | Australia |
| CRI | Crooked Island Airport | Crooked Island | Bahamas |
| CRJ | Coorabie Airport | Ceduna | Australia |
| CRK | Diosdado Macapagal International (Clark International) | Luzon Island | Philippines |
| CRL | Charleroi Brussels South | Brussels |  Belgium |
| CRM | Catarman National Airport | Catarman | Philippines |
| CRN | Cromarty Airport | Inverness | United Kingdom of Great Britain and Northern Ireland |
| CRO | Salyer Farms Airport | Fresno | United States of America |
| CRP | Corpus Christi International Airport | Corpus Christi | United States of America |
| CRQ | Caravelas Airport | Porto Seguro | Brazil |
| CRR | Ceres Airport | Santa Fe | Argentina |
| CRS | Corsicana Airport | Dallas | United States of America |
| CRT | Z M Jack Stell Field Airport | Monroe | United States of America |
| CRU | Carriacou Island Airport | St. George's |  Grenada |
| CRV | Crotone Airport | Lamezia-Terme | Italy |
| CRW | Yeager Airport | Charleston | United States of America |
| CRX | Roscoe Turner Airport | Tupelo | United States of America |
| CRY | Carlton Hill Airport | Kununurra | Australia |
| CRZ | Turkmenabad Airport | Mary |  Turkmenistan |
| CSA | Isle Of Colonsay Airport | Islay | United Kingdom of Great Britain and Northern Ireland |
| CSB | Caransebes Airport | Timisoara | Romania |
| CSC | Canas Airport | Liberia |  Costa Rica |
| CSD | Cresswell Downs Airport | Mcarthur River | Australia |
| CSE | Crested Butte Airport | Gunnison | United States of America |
| CSF | Creil Airport | Paris | France |
| CSG | Columbus Metropolitan Airport | Columbus | United States of America |
| CSH | Solovky Airport | Solovetsky | Russian Federation |
| CSI | Casino Airport | Lismore | Australia |
| CSJ | Cape St Jacques Airport | Con Dao | Viet Nam |
| CSK | Cap Skirring Airport | Dakar |  Senegal |
| CSL | O Sullivan Army Air Field Airport | Santa Maria | United States of America |
| CSM | Sherman | Dallas | United States of America |
| CSN | Carson City Airport | Reno | United States of America |
| CSO | Magdeburg–Cochstedt Airport | Leipzig/Halle | Germany |
| CSP | Coast Guard Heliport | Augusta | United States of America |
| CSQ | Municipal Airport | Fort Frances | Canada |
| CSR | Casuarito | Puerto Carreno | Colombia |
| CSS | Cassilandia Airport | Rio Verde | Brazil |
| CST | Castaway Airport | Nadi |  Fiji |
| CSU | Santa Cruz Do Sul Airport | Porto Alegre | Brazil |
| CSV | Memorial Airport | Chattanooga | United States of America |
| CSW | Colorado do Oeste Airport | Vilhena | Brazil |
| CSX | Changsha Airport | Changsha | China |
| CSY | Cheboksary Airport | Cheboksary | Russian Federation |
| CSZ | Brigadier Hector Ruiz Airport | Bahia Blanca | Argentina |
| CTA | Fontanarossa Airport | Catania | Italy |
| CTB | Cut Bank Airport | Great Falls | United States of America |
| CTC | Catamarca Airport | Catamarca | Argentina |
| CTD | Chitre Airport | Balboa | Panama |
| CTE | Carti Airport | Panama City | Panama |
| CTF | Coatepeque Airport | Guatemala City | Guatemala |
| CTG | Rafael Nunez Airport | Cartagena | Colombia |
| CTH | Chestercounty Carlson Airport | Wilmington | United States of America |
| CTI | Cuito Cuanavale Airport | Lubango | Angola |
| CTK | Canton Airport | Sioux Falls | United States of America |
| CTL | Charleville Airport | Charleville | Australia |
| CTM | Chetumal Airport | Chetumal | Mexico |
| CTN | Cooktown Airport | Cooktown | Australia |
| CTO | Peconic River Airport | Ronkonkoma | United States of America |
| CTP | Carutapera Airport | Sao Luiz | Brazil |
| CTQ | Do Palmar Airport | Rio Verde | Brazil |
| CTR | Cattle Creek Airport | Kununurra | Australia |
| CTS | Chitose Airport | Sapporo |  Japan |
| CTT | Le Castellet Airport | Toulon | France |
| CTU | Shuangliu Airport | Chengdu | China |
| CTW | Cottonwood Airport | Prescott | United States of America |
| CTX | Cortland Airport | Ithaca | United States of America |
| CTY | Cross City Airport | Gainesville | United States of America |
| CTZ | Sampson County Airport | Fayetteville | United States of America |
| CUA | Ciudad Constitucion Airport | Loreto | Mexico |
| CUB | Jim Hamilton–L.B. Owens Airport | Columbia | United States of America |
| CUC | Camilo Dazo Airport | Cucuta | Colombia |
| CUD | Caloundra Airport | Sunshine Coast | Australia |
| CUE | Cuenca Airport | Cuenca |  Ecuador |
| CUF | Levaldigi Airport | Cuneo | Italy |
| CUG | Cudal Airport | Orange | Australia |
| CUH | Municipal Airport | Stillwater | United States of America |
| CUI | Currillo Airport | El Yopal | Colombia |
| CUJ | Culion Airport | Busuanga | Philippines |
| CUK | Caye Caulker Airport | Belize City |  Belize |
| CUL | Fedl De Bachigualato Airport | Culiacan | Mexico |
| CUM | Cumana Airport | Porlamar | Venezuela (Bolivarian Republic of) |
| CUN | Cancun International Airport | Cancun | Mexico |
| CUO | Caruru Airport | Villavicencio | Colombia |
| CUP | Carupano Airport | Porlamar | Venezuela (Bolivarian Republic of) |
| CUQ | Coen Airport | Weipa | Australia |
| CUR | Hato International Airport | Curacao |  Netherlands |
| CUS | Municipal Airport | Silver City | United States of America |
| CUT | Cutral Airport | Neuquen | Argentina |
| CUU | Gen Fierro Villalobos Airport | Chihuahua | Mexico |
| CUV | Casigua Airport | La Fria | Venezuela (Bolivarian Republic of) |
| CUW | Cube Cove Airport | Juneau | United States of America |
| CUX | Cuddihy Field | Corpus Christi | United States of America |
| CUY | Cue Airport | Geraldton | Australia |
| CUZ | Velazco Astete Airport | Cuzco | Peru |
| CVB | Chungribu Airport | Mount Hagen | Papua New Guinea |
| CVC | Cleve Airport | Port Lincoln | Australia |
| CVE | Covenas Airport | Corozal | Colombia |
| CVF | Courchevel Airport | Valence | France |
| CVG | Cincinnati/Northern Kentucky Airport | Cincinnati | United States of America |
| CVH | Caviahue Airport | San Martin De Los Andes | Argentina |
| CVI | Caleta Olivia Airport | Comodoro Rivadavia | Argentina |
| CVJ | General Mariano Matamoros Airport | Mexico City | Mexico |
| CVL | Cape Vogel Airport | Alotau | Papua New Guinea |
| CVM | Ciudad Victoria Airport | Ciudad Victoria | Mexico |
| CVN | Municipal Airport | Clovis | United States of America |
| CVO | Corvallis Municipal Airport | Eugene | United States of America |
| CVQ | Carnarvon Airport | Carnarvon | Australia |
| CVR | Hughes Airport | Hughes | United States of America |
| CVS | Cannon AFB | Clovis | United States of America |
| CVT | West Midlands International Airport | Coventry | United Kingdom of Great Britain and Northern Ireland |
| CVU | Corvo Island Airport | Corvo Island (Azores) | Portugal |
| CWA | Central Wisconsin Airport | Wausau | United States of America |
| CWB | Afonso Pena International Airport | Curitiba | Brazil |
| CWC | Chernovtsy Airport | Chernivtsi | Ukraine |
| CWG | Callaway Gardens Airport | Columbus | United States of America |
| CWI | Clinton Airport | Moline | United States of America |
| CWL | Cardiff Airport | Cardiff | United Kingdom of Great Britain and Northern Ireland |
| CWO | Ft Wolter AAF airport | Panama City | United States of America |
| CWP | Campbellpore Airport | Islamabad | Pakistan |
| CWR | Cowarie Airport | Olympic Dam | Australia |
| CWS | Center Island Airport | Friday Harbor | United States of America |
| CWT | Cowra Airport | Orange | Australia |
| CWW | Corowa Airport | Albury | Australia |
| CXA | Caicara Del Orinoco Airport | Barcelona | Venezuela (Bolivarian Republic of) |
| CXC | Chitina Airport | Cordova | United States of America |
| CXF | Coldfoot Airport | Nuiqsut | United States of America |
| CXH | Coal Harbour | Vancouver | Canada |
| CXI | Cassidy International Airport | Christmas Island | Kiribati |
| CXJ | Campo Dos Bugres Airport | Caxias do Sul | Brazil |
| CXL | Calexico International Airport | Imperial | United States of America |
| CXN | Candala Airport | Hargeisa | Somalia |
| CXO | Montgomery Co Airport | Houston | United States of America |
| CXP | Tunggul Wulung Airport | Yogyakarta | Indonesia |
| CXQ | Christmas Creek Airport | Broome | Australia |
| CXR | Cam Ranh International Airport | Nha Trang | Viet Nam |
| CXT | Charters Towers Airport | Townsville | Australia |
| CXY | Cat Cays Airport | Bimini | Bahamas |
| CYA | Les Cayes Airport | Port Au Prince | Haiti |
| CYB | Gerrard-Smith Airport | Cayman Brac Island |  Cayman Islands |
| CYC | Caye Chapel Airport | Belize City | Belize |
| CYE | Crystal Lake Airport | Joplin | United States of America |
| CYF | Chefornak SPB | Chefornak | United States of America |
| CYG | Corryong Airport | Albury | Australia |
| CYI | Chiayi Airport | Chiayi | Taiwan, Province of China |
| CYL | Coyoles Airport | La Ceiba | Honduras |
| CYM | Chatham SPB Airport | Tenakee Springs | United States of America |
| CYO | Cayo Largo Del Sur Airport | Cayo Largo Del Sur | Cuba |
| CYP | Calbayog Airport | Calbayog | Philippines |
| CYR | Laguna De Los Patos Airport | Montevideo |  Uruguay |
| CYS | Cheyenne Airport | Laramie | United States of America |
| CYT | Yakataga Airport | Yakutat | United States of America |
| CYU | Cuyo Airport | Caticlan | Philippines |
| CYX | Cherskiy Airport | Cherskiy | Russian Federation |
| CYZ | Cauayan Airport | Cauayan | Philippines |
| CZA | Chichen Itza Airport | Merida | Mexico |
| CZB | Carlos Ruhl Airport | Santa Maria | Brazil |
| CZC | Copper Centre Airport | Valdez | United States of America |
| CZE | Coro Airport | Las Piedras | Venezuela (Bolivarian Republic of) |
| CZF | Cape Romanzof | Hooper Bay | United States of America |
| CZH | Corozal Airport | Belize City | Belize |
| CZJ | Corazon De Jesus Airport | Panama City | Panama |
| CZK | Cascade Locks/Stevens Airport | Portland | United States of America |
| CZL | Ain El Bey Airport | Constantine | Algeria |
| CZM | Cozumel Airport | Cozumel | Mexico |
| CZN | Chisana Field Airport | Yakutat | United States of America |
| CZO | Chistochina Airport | Valdez | United States of America |
| CZP | Cape Pole Airport | Klawock | United States of America |
| CZS | International Airport Cruzeiro Do Sul | Cruzeiro Do Sul | Brazil |
| CZT | Carrizo Springs Airport | Laredo | United States of America |
| CZU | Las Brujas Airport | Corozal | Colombia |
| CZW | Czestochowa Airport | Katowice |  Poland |
| CZX | Changzhou Airport | Changzhou | China |
| CZY | Cluny Airport | Mount Isa | Australia |
| CZZ | Campo Airport | Liberal | United States of America |