This is a list of airlines that are based in Ontario which have an air operator's certificate issued by Transport Canada, the country's civil aviation authority.

Current airlines Airline Image IATA ICAO Callsign Hub airport(s) orheadquartersNotesAdler AviationSWHSHOCKWAVEWaterlooCharters, cargo, flight trainingAdler AviationAirExpress OntarioOttawa Macdonald–Cartier,Chatham-Kent,Oshawa MunicipalChartersAirExpress OntarioBearskin AirlinesBLSBEARSKINSioux Lookout,Thunder BayRegional, scheduled passenger service, chartersBearskin AirlinesBrock Air ServicesBRDBROCK AIRKingston/Norman RogersCharters and MEDIVAC (air ambulance)About The Kingston Airport CargojetW8CJTCARGOJETJohn C. Munro HamiltonCargoCargojet AirwaysFirst Air7FFABFIRST AIRYellowknife,IqaluitScheduled passenger service, cargo, chartersFirst Air route map FlightexecFEXButtonville,LondonCharter airline, MEDIVAC (air ambulance)FlightexecThe Craig Evan Corporation O/A FlightexecHelicopter Transport ServicesCarpCharters, MEDIVAC (air ambulance), aerial firefightingHelicopter Transport Services - AboutNakina Air ServiceT2NakinaFloatplane chartersNakina Air Service at Pilot Career CentreOrngeThunder Bay,Sioux Lookout,Timmins/Victor M. PowerAir ambulancePorter AirlinesPDPOEPORTER AIRBilly Bishop TorontoRegional airlineSilverline HelicoptersHolland LandingSkyLink AviationSKKSKYLINKToronto PearsonCharters, cargoSkyLink AviationSkyLink ExpressSLQSKYLINKToronto PearsonCharters, cargoSkyLink ExpressStanton AirwaysOrillia/Lake St JohnFloatplanes, charters and fly-in fishing campsStanton AirwaysSuperior AirwaysRed LakeChartersSuperior AirwaysThunder AirlinesTHUAIR THUNDERThunder BayScheduled passenger service, chartersThunder AirlinesVoyageur AirwaysVCVALVOYAGEURNorth Bay/Jack GarlandCharters, MEDIVAC (air ambulance)Voyageur Airways Wasaya AirwaysWSGWASAYAThunder BayScheduled passenger service, chartersWasaya Airways White River AirWRAWhite RiverFly-in outpostsWhite River Air Charter Services Wilderness AirVermilion BayFloatplanes, fly-in fishing campsWilderness Air

Defunct airlines Airline Image IATA ICAO Callsign Hub airport(s) orheadquartersNotes30000 Island AirParry Sound Harbour2000? - ?, charter rental and leasing service air operator based in Parry Sound, Ontario using de Havilland Canada DHC-2 BeaverAir OntarioGXONTONTARIOLondon1987 - 2001, to Air Canada JazzAir TorontoCSCNECONNECTORToronto Pearson1984 - 1991AllCanada ExpressCNXCANEXToronto Pearson1992 - 2005Austin AirwaysAAWTimmins/Victor M. Power1934 - 1987, to Air OntarioCanada 30002TCMMELITEToronto Pearson1988 - 2001, formerly Canada 2000; Canada 3000 Cargo sold to Cargojet and 2005 revival failedCity ExpressPeterborough1971 - 1991, founded as Air Atonabee 1971Great Lakes AirlinesSarnia Chris Hadfield1958 - 1983, to Air OntarioIntairNDINTINTAIRToronto Pearson1989 - 1991, established by City Express as a successor to Skycraft Air TransportMillardairToronto Pearson1962 - 1990, continued as aircraft maintenance and servicing firm Millard Air Incorporated (Millardair MRO) 1990–2012NAC AirHMRHAMMERThunder Bay2000 - 2008, North American Charters was 100% First Nations ownedNorOntairNOANORONTAIRSault Ste. Marie1971 - 1996, airline operations of Ontario Northland Transportation CommissionOdyssey InternationalOLODYODYSSEYToronto Pearson1988 - 1990, name, aircraft and some employees were merged with Nationair, and operated as a separate division of Nolisair for a short period of timeOntario Central AirlinesNUNNUNASIKenora1947 - 1991?, became Nunasi-Central Airlines in 1984 and then to Nunasi-Northland Airlines in 1987Ontario Express9XOELPARTNER1980s - 1998, to Canadian AirlinesPem-AirPDOEMPEM-AIRPembroke1970 - 2002Roots Air6JSSVSKYTOURToronto Pearson2000 - 2001, part of Roots Canada, ceased operations when ownership acquired by Air CanadaSkycraft Air TransportOshawa1977 - 1989, reincarnated in 1989 and operating until 1994.Skyservice Airlines5GSSVSKYTOURToronto Pearson1986 - 2010, differs from existing Skyservice Business Aviation - same ownersSoundairSDRSOUNDAIRToronto Pearson1973-1990, owned Odyssey International and Air Toronto. Previously Owen Sound Air Services. DBA Soundair Express.Starratt AirwaysHudson, Kenora District1932 - 1942, to Canadian Pacific AirlinesVacationairToronto1988 - 1990, initiated by Gray Coach LinesVision Airways CorporationV6VSNVISIONTimmins/Victor M. Power? - 1994VistajetVJTVISTAOttawa,Toronto,Windsor1997 - 1997Zoom AirlinesZ4OOMZOOMOttawa Macdonald–Cartier2002 - 2008, named acquired for new XPO Airlines 2009

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