- Carriel Sur International AirportIdent: SCIECountry: Chile
- Casa De Campo International AirportIdent: MDLRCountry: Dominican Republic
- Cassidy International AirportIdent: PLCHCountry: Kiribati
- Cat Bi International AirportIdent: VVCICountry: Vietnam
- Catania-Fontanarossa AirportIdent: LICCCountry: Italy
- Cataratas International AirportIdent: SBFICountry: Brazil
- Cayenne – Félix Eboué AirportIdent: SOCACountry: French Guiana
- Cesaria Evora International AirportIdent: GVSVCountry: Cape Verde
- Changchun Longjia International AirportIdent: ZYCCCountry: China
- Changsha Huanghua International AirportIdent: ZGHACountry: China
- Chania International AirportIdent: LGSACountry: Greece
- Charles de Gaulle International AirportIdent: LFPGCountry: France
- Charleston International AirportIdent: KCHSCountry: United States
- Charlotte Douglas International AirportIdent: KCLTCountry: United States
- Chaudhary Charan Singh International AirportIdent: VILKCountry: India
- Cheddi Jagan International AirportIdent: SYCJCountry: Guyana
- Chengdu Shuangliu International AirportIdent: ZUUUCountry: China
- Chengdu Tianfu International AirportIdent: ZUTFCountry: China
- Chennai International AirportIdent: VOMMCountry: India
- Cheongju International Airport/Cheongju Air Base (K-59/G-513)Ident: RKTUCountry: South Korea
- Chhatrapati Shivaji Maharaj International AirportIdent: VABBCountry: India
- Chiang Mai International AirportIdent: VTCCCountry: Thailand
- Chicago Midway International AirportIdent: KMDWCountry: United States
- Chicago O'Hare International AirportIdent: KORDCountry: United States
- Chief Dawid Stuurman International AirportIdent: FAPECountry: South Africa
- Chileka International AirportIdent: FWCLCountry: Malawi
- Chita-Kadala International AirportIdent: UIAACountry: Russia
- Chişinău International AirportIdent: LUKKCountry: Moldova
- Chlef Aboubakr Belkaid International AirportIdent: DAOICountry: Algeria
- Chongqing Jiangbei International AirportIdent: ZUCKCountry: China
- Christchurch International AirportIdent: NZCHCountry: New Zealand
- Chubu Centrair International AirportIdent: RJGGCountry: Japan
- Chuuk International AirportIdent: PTKKCountry: Micronesia
- Ciampino–G. B. Pastine International AirportIdent: LIRACountry: Italy
- Cibao International AirportIdent: MDSTCountry: Dominican Republic
- Cincinnati Northern Kentucky International AirportIdent: KCVGCountry: United States
- City of Colorado Springs Municipal AirportIdent: KCOSCountry: United States
- Clark International Airport / Clark Air BaseIdent: RPLCCountry: Philippines
- Clermont-Ferrand Auvergne airportIdent: LFLCCountry: France
- Cleveland Hopkins International AirportIdent: KCLECountry: United States
- Cochin International AirportIdent: VOCICountry: India
- Cocos (Keeling) Islands AirportIdent: YPCCCountry: Cocos (Keeling) Islands
- Coimbatore International AirportIdent: VOCBCountry: India
- Cologne Bonn AirportIdent: EDDKCountry: Germany
- Colombo Ratmalana International AirportIdent: VCCCCountry: Sri Lanka
- Comodoro Arturo Merino Benítez International AirportIdent: SCELCountry: Chile
- Congonhas–Deputado Freitas Nobre AirportIdent: SBSPCountry: Brazil
- Copenhagen Kastrup AirportIdent: EKCHCountry: Denmark
- Copernicus Wrocław AirportIdent: EPWRCountry: Poland
- Corfu Ioannis Kapodistrias International AirportIdent: LGKRCountry: Greece
- Corisco International AirportIdent: OCSCountry: Equatorial Guinea
- Cork International AirportIdent: EICKCountry: Ireland
- Coronel FAP Francisco Secada Vignetta International AirportIdent: SPQTCountry: Peru
- Cotonou Cadjehoun International AirportIdent: DBBBCountry: Benin
- Cozumel International AirportIdent: MMCZCountry: Mexico
- Craiova International AirportIdent: LRCVCountry: Romania
- Cristiano Ronaldo International AirportIdent: LPMACountry: Portugal
- Curitiba-Afonso Pena International AirportIdent: SBCTCountry: Brazil
- Cyril E. King AirportIdent: TISTCountry: U.S. Virgin Islands
- César Manrique-Lanzarote AirportIdent: GCRRCountry: Spain