| ICAO | IATA | NAME |
|---|
| SRJ | | C Air Jet Airlines |
| TIP | | C and M Aviation |
| ORO | | C N Air |
| RWG | | C&M Airways |
| RMU | | C.S.P., Societe |
| CBR | | Cabair College of Air Training |
| CBI | | CABI |
| CVE | | Cabo Verde Express |
| CWD | | Caernarfon Airworld |
| CPI | | CAI |
| CCE | | Cairo Air Transport Company |
| ICL | 5C | CAL Cargo Air Lines |
| CGC | | Cal Gulf Aviation |
| REZ | | Cal-West Aviation |
| CSL | | California Air Shuttle |
| CLI | XG | Calima Aviacion |
| CAV | MO | Calm Air |
| CMR | | CAM Air Management |
| CAM | R9 | Camai Air |
| KHM | | Cambodia Airlines |
| UYC | UY | Cameroon Airlines |
| HSO | | Campania Helicopteros De Transporte |
| PIL | | Canada Jet Charters |
| CDN | CP | Canadian Airlines |
| CTG | | Canadian Coast Guard |
| HIA | | Canadian Eagle Aviation |
| CFC | | Canadian Forces |
| BZD | | Canadian Global Air Ambulance |
| CDN | | Canadian Helicopters |
| TKR | | Canadian Interagency Forest Fire Centre |
| XNC | | Canadian National Telecommunications |
| MPE | 5T | Canadian North |
| CDR | | Canadian Regional Airlines |
| CWH | | Canadian Warplane Heritage Museum |
| CWA | W2 | Canadian Western Airlines |
| CWW | | Canair |
| CUI | | Cancun Air |
| CJA | C6 | CanJet |
| KAP | 9K | Cape Air |
| CTO | | Cape Air Transport |
| SEM | | Cape Central Airways |
| CMY | | Cape Smythe Air |
| CPX | | Capital Air Service |
| CPD | | Capital Airlines |
| NCP | | Capital Airlines Limited |
| CCI | PT | Capital Cargo International Airlines |
| CCQ | | Capital City Air Carriers |
| EGL | | Capital Trading Aviation |
| CEX | | Capitol Air Express |
| CWZ | | Capitol Wings Airline |
| VAN | | Caravan Air |
| CWN | | Cardiff Wales Flying Club |
| FVA | | Cardinal/Air Virginia |
| GOL | | Cardolaar |
| CDI | | Cards Air Services |
| CFH | | Care Flight |
| CDM | | Carga Aerea Dominicana |
| EST | | Carga Express Internacional |
| GGC | GG | Cargo 360 |
| MCX | | Cargo Express |
| CRV | | Cargo Ivoire |
| CLM | | Cargo Link (Caribbean) |
| CGP | 8L | Cargo Plus Aviation |
| CTW | | Cargo Three |
| CRG | 2G | Cargoitalia |
| CJT | W8 | Cargojet Airways |
| CLX | CV | Cargolux |
| CGM | | Cargoman |
| DEL | | Carib Aviation |
| BCB | | Carib Express |
| CBC | | Caribair |
| DCC | | Caribbean Air Cargo |
| CLT | | Caribbean Air Transport |
| BWA | BW | Caribbean Airlines |
| IQQ | | Caribbean Airways |
| TLC | | Caribbean Express |
| GFI | 8B | Caribbean Star Airlines |
| CRT | | Caribintair |
| CVG | | Carill Aviation |
| KRP | V3 | Carpatair |
| CRR | | Carranza |
| ULS | | Carroll Air Service |
| CMT | | Casement Aviation |
| CSO | | Casino Airline |
| CSP | | Casper Air Service |
| CPN | RV | Caspian Airlines |
| CSJ | | Castle Aviation |
| CAZ | | Cat Aviation |
| CTZ | | CATA Línea Aérea |
| CBT | | Catalina Flying Boats |
| TEX | | Catex |
| CPA | CX | Cathay Pacific |
| CJR | | Caverton Helicopters |
| CAY | KX | Cayman Airways |
| CCF | | CCF Manager Airline |
| CEB | 5J | Cebu Pacific |
| CIL | | Cecil Aviation |
| CED | | CEDTA (Compania Ecuatoriana De Transportes Aereos) |
| CEG | | Cega Aviation |
| CEC | | Celtic Airways |
| CWE | | Celtic West |
| CNA | 7N | Centavia |
| CNL | | Centennial Airlines |
| CNS | | Centennial Flight Centre |
| CVO | | Center Vol |
| CTS | | Center-South |
| CET | | Centrafrican Airlines |
| CAX | | Central Air Express |
| CTL | | Central Airlines |
| CNY | | Central Airways |
| ACN | | Central American Airlines |
| YOG | | Central Aviation |
| CCG | | Central Connect Airlines |
| DRN | | Central De Discos De Reynosa |
| CMA | | Central European Airlines |
| CHA | | Central Flying Service |
| CEM | | Central Mongolia Airways |
| GLR | | Central Mountain Air |
| CQC | | Central Queensland Aviation College |
| CSI | | Central Skyport |
| CLW | C0 | Centralwings |
| DTV | | Centre Airlines |
| CGS | | Centre of Applied Geodynamica |
| CVC | J7 | Centre-Avia |
| ACF | | Centro de Formacion Aeronautica de Canarias |
| CCV | | Centro De Helicopteros Corporativos |
| CWC | WE | Centurion Air Cargo |
| URY | | Century Aviation |
| HAI | | Century Aviation International |
| XAD | | Certified Air Dispatch |
| CER | | Cetraca Aviation Service |
| IRU | | Chabahar Airlines |
| CLG | | Chalair Aviation |
| CLS | | Challenge Air Transport |
| CHS | | Challenge Aviation |
| OFF | | Challenge International Airlines |
| CPH | | Champagne Airlines |
| CCP | MG | Champion Air |
| NCH | | Chanchangi Airlines |
| CGN | 2Z | Changan Airlines |
| CHN | | Channel Island Aviation |
| WML | | Chantilly Air |
| CPL | | Chaparral Airlines |
| CSU | S8 | Chari Aviation Services |
| CAH | | Charlan Air Charter |
| HMD | | Charlie Hammonds Flying Service |
| CGD | | Charlotte Air National Guard |
| CHW | | Charter Air |
| HRT | | Chartright Air |
| CHQ | RP* | Chautauqua Airlines |
| SCH | AW | CHC Airways |
| HBI | | CHC Denmark |
| HEM | | CHC Helicopters |
| HKS | | CHC Helikopter Service |
| CBB | | Cheboksary Airenterprise JSC |
| CHM | | Chemech Aviation |
| CHZ | | Cherline |
| CMK | | Chernomor-Avia |
| CBM | | Cherokee Express |
| CCY | | Cherry Air |
| CAB | | Chesapeake Air Service |
| CVR | | Chevron U.S.A |
| CYA | | Cheyenne Airways |
| CGO | | Chicago Air |
| WDY | C8 | Chicago Express |
| RAT | | Chief Rat Flight Services |
| CCH | | Chilchota Taxi Aereo |
| DES | | Chilcotin Caribou Aviation |
| CAD | | Chilliwack Aviation |
| ETN | | Chim-Nir Aviation |
| CAL | CI | China Airlines |
| CKK | CK | China Cargo Airlines |
| CES | MU | China Eastern Airlines |
| HXA | | China Express Airlines |
| CFA | | China Flying Dragon Aviation |
| CTH | | China General Aviation Corporation |
| CAG | | China National Aviation Corporation |
| CBF | CJ | China Northern Airlines |
| CNW | WH | China Northwest Airlines |
| CHC | | China Ocean Helicopter Corporation |
| CYZ | 8Y | China Postal Airlines |
| CSN | CZ | China Southern Airlines |
| CXN | | China Southwest Airlines |
| CUA | HR | China United Airlines |
| CXH | XO | China Xinhua Airlines |
| CGU | | Chinguetti Airlines |
| CEP | | Chipola Aviation |
| CPW | | Chippewa Air Commuter |
| CHF | X7 | Chitaavia |
| CAS | | Christman Air System |
| OEC | | Christophorus Flugrettungsverein |
| CHO | | Chrome Air Services |
| CHU | | Church Aircraft |
| CFN | | Church Fenton Flying Training Unit |
| VCI | | CI-Tours |
| CIU | A2 | Cielos Airlines |
| CIM | QI | Cimber Air |
| RRU | | Cirrus |
| NTS | | Cirrus Air |
| RUS | C9 | Cirrus Airlines |
| JTI | | Cirrus Middle East |
| FIV | | Citationshares |
| XCX | | Citibank |
| HZX | | Citic General Aviation |
| SDR | CF | City Airline |
| CIX | G3 | City Connexion Airlines |
| XBG | | City of Bangor |
| CAQ | | Cityair (Chester) Limited |
| CII | | Cityfly |
| CFE | CJ | Cityflyer Express |
| BCY | WX | CityJet |
| CNB | | Cityline Hungary |
| HSR | | Citylink Airlines |
| CIW | | Civair Airways |
| BKR | | Civil Air Patrol South Carolina Wing |
| CAT | CT | Civil Air Transport |
| CIA | | Civil Aviation Authority |
| CIV | | Civil Aviation Authority of New Zealand |
| CBA | | Civil Aviation Inspectorate of the Czech Republic |
| CKC | | CKC Services |
| FMC | | Claessens International Limited |
| CLK | | Clark Aviation |
| CSF | | Clasair |
| CLY | | Clay Lacy Aviation |
| CGK | | Click Airways |
| CLZ | | Cloud 9 Air Charters |
| CLD | | Clowes Estates Limited |
| SDJ | | Club 328 |
| ISG | 6P | Club Air |
| CMZ | | CM Stair |
| CNT | | CNET |
| OAP | | COAPA AIR |
| CST | BX | Coast Air |
| DQ | Coastal Air |
| TCL | | Coastal Air Transport |
| CNG | | Coastal Airways |
| CSV | | Coastal Travels |
| CHL | | Cohlmia Aviation |
| OLR | | Colaereos |
| CLE | | Colemill Enterprises |
| CJC | 9L | Colgan Air |
| CAE | | Colibri Aviation |
| CCX | | Colt International |
| COH | | Coltishall Flying Training Unit |
| COL | | Columbia Airlines |
| WCO | | Columbia Helicopters |
| KLR | | Columbus Air Transport |
| GHP | | Colvin Aviation |
| COM | OH | Comair |
| CAW | MN | Comair |
| PDR | | COMAV |
| CDE | | Comed Group |
| CVV | | Comeravia |
| CRS | | Comercial Aerea |
| CMG | | Comet Airlines |
| FYN | | Comfort Air |
| CLA | | Comlux Aviation |
| CMH | | Commair Aviation |
| CTM | | Commandement Du Transport Aerien Militaire Francai |
| CML | | Commander Air Charter |
| CRM | | Commander Mexicana |
| CMS | | Commercial Aviation |
| GAR | | Commodore Aviation |
| CJS | | Commonwealth Jet Service |
| UCA | C5 | CommutAir |
| CWK | KR | Comores Airlines |
| CGR | | Compagnia Generale Ripreseaeree |
| CMM | | Compagnie Aerienne du Mali |
| GIC | | Compagnie de Bauxites de Guinee |
| CPM | | Compagnie Mauritanienne Des Transports |
| BFN | | Compangnie Nationale Naganagani |
| AIF | | Compania Aerea de Valencia |
| ATF | | Compania Aerotecnicas Fotograficas |
| ASU | | Compania Boliviana de Transporte Aereo Privado Aer |
| LCT | | Compania De Actividades Y Servicios De Aviacion |
| TAV | | Compania de Servicios Aereos Tavisa |
| EJV | | Compania Ejecutiva |
| HSE | | Compania Helicopteros Del Sureste |
| MDR | | Compania Mexicana De Aeroplanos |
| MXC | GJ | Compania Mexicargo |
| HSS | | Compania Transportes Aereos Del Sur |
| CYF | | Company Flight |
| CPZ | CP | Compass Airlines |
| CPS | | Compass International Airways |
| XCO | | Compuflight Operations Service |
| XCS | | Compuserve Incorporated |
| CRC | | Conair Aviation |
| COD | | Concordavia |
| CIB | | Condor |
| CNR | | Condor Aero Services |
| CFG | DE | Condor Flugdienst |
| COF | | Confort Air |
| CAK | | Congo Air |
| CGA | | Congressional Air |
| ROY | | Conifair Aviation |
| CBY | | Coningsby Flying Training Unit |
| BSN | | Connectair Charters |
| CAC | | Conquest Airlines |
| CXO | | Conroe Aviation Services |
| CHP | 6A | Consorcio Aviaxsa |
| VCH | | Consorcio Helitec |
| UZA | | Constanta Airline |
| KIS | | Contactair |
| XCL | | Contel ASC |
| COA | CO | Continental Airlines |
| PVV | PC | Continental Airways |
| CO | Continental Express |
| CMI | CS | Continental Micronesia |
| CON | | Continental Oil |
| TSU | | Contract Air Cargo |
| VCV | V0 | Conviasa |
| CKA | | Cook Inlet Aviation |
| SVY | | Cooper Aerial Surveys |
| CMP | CM | Copa Airlines |
| CAT | | Copenhagen Airtaxi |
| COP | | Copper State Air Service |
| AAQ | | Copterline |
| CCW | | Coptrade Air Transport |
| CAI | | Corendon Airlines |
| CRA | | Coronado Aerolineas |
| CPB | | Corpac Canada |
| CNC | | Corporacion Aereo Cencor |
| CPG | | Corporacion Aeroangeles |
| CGY | | Corporacion Paraguaya De Aeronautica |
| CPT | | Corporate Air |
| CPR | | Corporate Air |
| CPO | | Corporate Aircraft Company |
| COO | | Corporate Airlink |
| CKE | | Corporate Aviation Services |
| VHT | | Corporate Flight International |
| VTE | | Corporate Flight Management |
| CJI | | Corporate Jets |
| CRL | SS | Corsairfly |
| CCM | XK | Corse-Mediterranee |
| COZ | F5 | Cosmic Air |
| COT | | Cottesmore Flying Training Unit |
| CHI | | Cougar Helicopters |
| MGB | | Coulson Flying Service |
| NSW | | Country Connection Airlines |
| CIK | | Country International Airlines |
| CSD | | Courier Services |
| CUT | | Court Helicopters |
| CVL | | Coval Air |
| COW | | Cowi |
| COY | 7C | Coyne Aviation |
| CFD | | Cranfield University |
| CWL | | Cranwell Flying Training Unit |
| CRE | | Cree Airways |
| ELM | | Crelam |
| CAN | | Crest Aviation |
| CRH | | CRI Helicopters Mexico |
| KRM | | Crimea Universal Avia |
| CTN | OU | Croatia Airlines |
| HRZ | | Croatian Air Force |
| CRX | | Cross Aviation |
| ECC | QE | Crossair Europe |
| CWX | | Crow Executive Air |
| CKR | | Crown Air Systems |
| CRO | | Crown Airways |
| CRW | | Crownair |
| VCR | | Cruiser Linhas Aereas |
| CTY | | Cryderman Air Service |
| CYT | | Crystal Shamrock |
| IRO | | CSA Air |
| CSE | | CSE Aviation |
| CTQ | | CTK Network Aviation |
| CUB | CU | Cubana de Aviación |
| CBL | | Cumberland Airways (Nicholson Air Service) |
| CTT | | Custom Air Transport |
| RGN | | Cygnus Air |
| CYC | | Cyprair Tours |
| CYS | | Cypress Airlines |
| CYP | CY | Cyprus Airways |
| YK | Cyprus Turkish Airlines |
| CEF | | Czech Air Force |
| AHD | | Czech Air Handling |
| CSA | OK | Czech Airlines |
| CIE | | Czech Government Flying Service |
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