ICAO airline designator (O)

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ICAO airline designator codes beginning:
A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

This is a list of current ICAO Designators for Aircraft Operating Agencies, Aeronautical Authorities and Services^[1]:

Code	Airline or company	Callsign	Country
OAA	Oxley Aviation		Australia
OAC	Oriental Airlines	ORIENTAL AIR	Nigeria
OAD	Orscom Tourist Installations Company	ORSCOM	Egypt
OAE	Omni Air Express	OMNI-EXPRESS	United States
OAL	Olympic Airlines	OLYMPIC	Greece
OAO	Arkhangelsk 2 Aviation Division	DVINA	Russian Federation
OAP	COAPA AIR	COAPA	Mexico
OAV	Omni - Aviacao e Tecnologia	OMNI	Portugal
OAW	Helvetic Airways	HELVETIC	Switzerland
OAX	Operational Aviation Services		Australia
OBA	Aerobanana	AEROBANANA	Mexico
OBK	Amako Airlines	AMAKO AIR	Nigeria
OCA	Aeroservicios Caraboba (Aserca Airlines)	AROSCA	Venezuela
OCE	Heliocean	HELIOCEAN	France
OCF	Ocean Airlines	EXPLORER	France
OCM	O'Connor Airlines	OCONNOR	Australia
OCN	O Air	O-BIRD	France
OCO	Ostend Air College	AIR COLLEGE	Belgium
OCS	Ocean Sky (UK)	OCEANSKY	United Kingdom
ODI	Jonsson, H Air Taxi	ODINN	Iceland
ODS	Odessa Airlines	ODESSA AIR	Ukraine
ODY	Odyssey International	ODYSSEY	Canada
OEA	Orient Thai Airlines	ORIENT THAI	Thailand
OEC	Christophorus Flugrettungsverein	CHRISTOPHORUS	Austria
OED	Orion Air Charter	ORION CHARTER	South Africa
OFA	Helitaxi Ofavi	OFAVI	Mexico
OFF	Challenge International Airlines	CHALLENGE AIR	United States
OGI	Aerogisa	AEROGISA	Mexico
OGJ	Bakoji Airlines Services	BAKO AIR	Nigeria
OGN	Origin Pacific Airways	ORIGIN	New Zealand
OHK	Oasis Hong Kong Airlines		Hong Kong SAR China
OHY	Onur Air	ONUR AIR	Turkey
OIC	Iwamoto Crane Co Ltd		Japan
OIX	Orion-x	ORIONIX	Russian Federation
OJY	Florida Air	OHJAY	United States
OKA	Okay Airways Company	OKAYJET	China
OKJ	Okada Airlines	OKADA AIR	Nigeria
OKL	Oklahoma Department of Public Safety Troop O	OKLAHOMA	United States
OKP	Okapi Airways	OKAPI	Democratic Republic of Congo
OKS	Slok Air International (Gambia)	SLOK GAMBIA	Gambia
OKT	Soko Aviation	SOKO AIR	Spain
OLA	Overland Airways	OVERLAND	Nigeria
OLC	Solar Cargo	SOLARCARGO	Venezuela
OLE	Operadora de Lineas Ejecutivas	OPERADORA	Mexico
OLO	Soloflight	SOLO	United Kingdom
OLR	Colaereos	COLAEREOS	Ecuador
OLT	Ostfriesische Lufttransport	OLTRA	Germany
OLV	Aerolineas Olve	OLVE	Mexico
OLX	Olimex Aerotaxi	OLIMEX	Czech Republic
OLY	Olympic Aviation	OLAVIA	Greece
OMA	Oman Air	OMAN AIR	Oman
OMF	Omniflys	OMNIFLYS	Mexico
OMG	Aeromega	OMEGA	United Kingdom
OML	Organizacoes Mambra	MAMBRA	Angola
OMR	Minair	ORMINE	Central African Republic
OMS	Omskavia Airline	OMSK	Russian Federation
ONE	Oceanair - Linhas Aereas	OCEANAIR	Brazil
ONG	Sonnig SA	SONNIG	Switzerland
ONM	Presidencia de La Republica de Guinea Ecuatorial		Equatorial Guinea
ONR	Air One Nine	EDER	Libya
ONT	Air Ontario	ONTARIO	Canada
OOM	Zoom Airlines	ZOOM	Canada
OOT	Out Of The Blue Air Safaris	OOTBAS	South Africa
OPA	Opal Air		Australia
OPC	Krystel Air Charter	OPTIC	United Kingdom
OPS	Jet-Ops	OPS-JET	United Arab Emirates
OPT	Flight Options	OPTIONS	United States
OPV	Operadora de Veulos Ejectutivos	OPERADORA DE VUELOS	Mexico
ORA	Montauk Caribbean Airways trading as Long Island Airlines	LONG ISLAND	United States
ORB	State Orenburg Avia Enterprise	ORENBURG	Russian Federation
ORD	Orange Air Services	ORANGE SERVICES	Sierra Leone
ORE	Orange Aviation	ORANGE AVIATION	Israel
ORF	Oman Royal Flight	OMAN	Oman
ORI	Orion Air	ORION AIR	Seychelles
ORJ	Orange Air Sierra Leone	ORANGE SIERRA	Sierra Leone
ORK	Orca Air	ORCA TAXI	Egypt
ORL	On Air Limited	ON AIR	Canada
ORM	Orel State Air Enterprise	ORPRISE	Russian Federation
ORN	Orient Airways	ORIENT LINER	Pakistan
ORO	C N Air	CAPRI	Spain
ORP	Aerocorp	CORPSA	Mexico
ORR	Operadora Turistica Aurora	TURISTICA AURORA	Mexico
ORS	Action Air	AVIATION SERVICE	Italy
ORX	Orbit Express Airlines (Orex)	OREX	Turkey
ORZ	Zorex	ZOREX	Spain
OSH	Osh Avia	OSH AVIA	Kyrgyzstan
OSL	Sosoliso Airlines	SOSOLISO	Nigeria
OSN	Aerosan	AEROSAN	Mexico
OSO	Aviapartner Limited Company		Russian Federation
OSS	Servicios Aereos Noticiosos	NOTICIOSOS	Mexico
OST	Airline Alania	ALANIA	Russian Federation
OSW	JetAfrica Swaziland	BEVO	Swaziland
OSY	Open Skies Consultative Commission	OPEN SKIES	United States
OTA	Organizacion De Transportes Aereos	ORGANIZACION	Mexico
OTL	South Airlines	SOUTHLINE	Ukraine
OTM	Onetime Airlines Zambia	ZEDTIME	Zambia
OTN	LASTP	LASTP	Sao Tome and Principe
OTP	Operadora de Transportes Aereos	OPERADORA AEREO	Mexico
OTR	Orient Airlines	ORIENTROC	Sudan
OUL	Air Atonabee	CITY EXPRESS	Canada
OVA	Aero Nova	AERONOVA	Spain
OVC	Aerovic		Ecuador
OVE	Aeromover	AEROMOVER	Mexico
OVI	Aerovias Ejecutivas	VIAS EJECUTIVAS	Mexico
OVV	Orient Air	ORIENTSYR	Syria
OWL	Miami Valley Aviation	NIGHT OWL	United States
OXE	Oxaero	OXOE	United Kingdom
OXO	Million Air	MILL AIR	United States
OYE	Koda International	KODA AIR	Nigeria
OZJ	Ozjet Airlines	AUSJET	Australia
OZR	Ozark Air Lines	OZARK	United States
OZU	Hozu-Avia	HOZAVIA	Kazakhstan
OZW	Skywest Airlines	OZWEST	Australia