| CAE | KCAE | Columbia Metropolitan Airport, United States |
| CAG | LIEE | Cagliari/Elmas Mario Mameli Airport, Italy |
| CAI | HECA | Cairo International Airport, Egypt |
| CAK | KCAK | Akron-Canton Regional Airport, United States |
| CAL | EGEC | Campbeltown Airport, United Kingdom |
| CAN | ZGGG | Guangzhou Baiyun International Airport, China PRC |
| CAX | EGNC | Carlisle Airport, United Kingdom |
| CAY | SOCA | Cayenne - Rochambeau Airport, French Guiana |
| CBB | SLCB | Cochabamba - Jorge Wilstermann Airport, Bolivia |
| CBE | KCBE | Cumberland Regional Airport, United States |
| CBG | EGSC | Cambridge Airport, United Kingdom |
| CBN | YSCB | Canberra International Airport, Australia |
| CCF | LFMK | Carcassonne Airport, France |
| CCJ | VOCL | Calicut International Airport, India |
| CCK | YPCC | Cocos Islands Airport, Australia |
| CCP | SCIE | Concepcion Airport, Chile |
| CCU | VECC | Kolkata - Netaji Subhas Chanra Bose Int´l Airport, India |
| CDG | LFPG | Paris - Charles De Gaulle Airport, France |
| CDU | YSCN | Camden Airport, Australia |
| CEG | EGNR | Chester Airport, United Kingdom |
| CEI | VTCR | Chiang Rai International Airport, Thailand |
| CEK | USCC | Chelyabinsk - Balandino Airport, Russia |
| CEN | MMCN | Ciudad Obregón Airport, Mexico |
| CEQ | LFMD | Cannes Airport, France |
| CER | LFRC | Cherbourg-Maupertus Aeroport, France |
| CEZ | KCEZ | Cortez Municipal Airport, United States |
| CFE | LFLC | Clermont Ferrand Auvergne International Airport, France |
| CFG | MUCF | Cienfuegos - Jamie González Int´l Airport, Carib,Cuba |
| CFN | EIDL | Donegal Int´l Airport, Ireland |
| CFU | LGKR | Corfu International Airport I Kapodistrias, Greece |
| CGB | SBCY | Cuiaba - Marechal Rondon International Airport, Brazil |
| CGH | SBSP | São Paulo - Congonhas Int´l Airport, Brazil |
| CGK | WIII | Jakarta - Soekarno-Hatta International Airport, Indonesia |
| CGN | EDDK | Cologne/Bonn Airport, Germany |
| CGO | ZHCC | Zhengzhou Xinzheng International Airport, China PRC |
| CGP | VGEG | Chittagong - Shah Amanat Int´l Airport, Bangladesh |
| CGQ | ZYCC | Changchun Longjia International Airport, China PRC |
| CGR | SBCG | Campo Grande International Airport, Brazil |
| CHA | KCHA | Chattanooga Metropolitan Airport, United States |
| CHC | NZCH | Christchurch International Airport Ltd, New Zealand |
| CHN | RKTU | Cheongju International Airport, South Korea |
| CHQ | LGSA | Chania International Airport K Daskalogiannis, Greece |
| CHR | LFLX | Châteauroux/Déols-Marcel Dassault Airport, France |
| CHS | KCHS | Charleston International Airport, United States |
| CIA | LIRA | Rome - Ciampino Airport, Italy |
| CID | KCID | Eastern Iowa Airport, United States |
| CJB | VOCB | Coimbatore Airport, India |
| CJC | SCCF | Calama Airport - El Loa, Chile |
| CJU | RKPC | Jeju International Airport, South Korea |
| CKG | JUCK | Chongqing Jiangbei International Airport, China PRC |
| CKY | GUCY | Conakry International Airport, Guinea |
| CLE | KCLE | Cleveland - Hopkins International Airport, United States |
| CLM | KNOW | Port Angeles-William R Fairchild Int´l Airport, United States |
| CLO | SKCL | Cali - Alfonso Bonilla Aragón Airport, Colombia |
| CLQ | MMIA | Colima Airport, Mexico |
| CLT | KCLT | Charlotte - Douglas Int´l Airport, United States |
| CLX | SPIM | Lima - Jorge Chavez International Airport, Peru |
| CLY | LFKC | Calvi - Sainte Catherine Aeroport, France |
| CMB | VCBI | Bandaranaike Int´l Airport, Sri Lanka |
| CME | MMCE | Ciudad del Carmen Airport, Mexico |
| CMF | LFLB | Chambery/Aix les Bains Airport, France |
| CMG | SBCR | Corumba Airport, Brazil |
| CMH | KCMH | Columbus - Port Columbus Int´l Airport, United States |
| CMI | KCMI | Champaign - Willard Airport, United States |
| CMN | GMMN | Casablanca - Mohammed V Airport, Morocco |
| CMR | LFGA | Colmar-Houssen Airport, France |
| CMW | MUCM | Camagüey-Ignacio Agramonte Airport, Carib,Cuba |
| CND | LRCK | Constanta - Mihail Kogalniceanu Airport, Romania |
| CNF | SBCF | Belo Horizonte - Tancredo Neves Int´l Airport, Brazil |
| CNN | UELL | Neryungri - Chulman Airport, Russia |
| CNS | YBCS | Cairns International Airport, Australia |
| CNX | VTCC | Chiang Mai Int´l Airport, Thailand |
| COK | VOCI | Cochin International Airport, India |
| COO | DBBB | Cotonou Cadjehoun Airport, Benin |
| COR | SACO | Cordoba - Ambrosio L V Taravella Airport, Argentina |
| COS | KCOS | Colorado Springs Airport, United States |
| CPE | MMCP | Campeche - Ingeniero Alberto Acuna Ongay Int´l Airport, Mexico |
| CPH | EKCH | Copenhagen - Kastrup International Airport, Denmark |
| CPO | SCHA | Copiapó Aerodrome - Chamonate, Chile |
| CPR | KCPR | Casper/Natrona County Int´l Airport, United States |
| CPT | FACT | Cape Town International Airport, South Africa |
| CRD | SAVC | Comodoro Rivadavia International Airport, Argentina |
| CRK | EICK | Cork International Airport, Ireland |
| CRL | EBCI | Brussels-South Charleroi Airport, Belgium |
| CRP | KCRP | Corpus Christi Int´l Airport, United States |
| CRV | LIBC | Crotone Airport, Italy |
| CRW | KCRW | Charleston - Yeager Airport, United States |
| CSX | ZGHA | Changsha Huanghua International Airport, China PRC |
| CTA | LICC | Catania-Fontanarossa Airport, Italy |
| CTC | SANC | Catamarca Airport, Argentina |
| CTG | SKCG | Cartagena - Rafael Nunez Airport, Colombia |
| CTM | MMCM | Chetumal International Airport, Mexico |
| CTS | RJCJ | Chitose - New Chitose Airport, Japan |
| CTU | ZUUU | Chengdu Shuangliu International Airport, China PRC |
| CUF | LIMZ | Cuneo-Levaldigi Airport, Italy |
| CUN | MMUN | Cancun Int´l Airport, Mexico |
| CUR | TNCC | Curacao - Hato Airport, Carib,Neth. Antilles |
| CUU | MMCU | Chihuahua - General Fierro Villalobos Airport, Mexico |
| CUZ | SPZO | Cuzco Velasco Astete Airport, Peru |
| CVG | KCVG | Cincinnati/N Kentucky Int´l Airport, United States |
| CVJ | MMCB | Cuernavaca Airport, Mexico |
| CVM | MMCV | Ciudad Victoria Airport, Mexico |
| CVT | EGBE | Coventry - West Midlands International Airport, United Kingdom |
| CWA | KAUW | Wausau - Central Wisconsin Regional Airport, United States |
| CWB | SBCT | Curitiba - Afonso Pena Airport, Brazil |
| CWC | UKLN | Chernivtsi International Airport, Ukraine |
| CWL | EGFF | Cardiff International Airport, United Kingdom |
| CYB | MWCB | Gerrard Smith International Airport, Carib,Cayman Islands |
| CYO | MUCL | Cayo Largo-Vilo Acuña Int´l Airport, Carib,Cuba |
| CYS | KCYS | Cheyenne Airport, United States |
| CZL | DABC | Constantine Airport, Algeria |
| CZM | MMCZ | Cozumel Airport, Mexico |
| CZS | SBCZ | Cruzeiro do Sul Int´l Airport, Brazil |
