A list of aircraft operators that have that have suffered an accident, serious incident or hijacking. The list may also contain defunct airlines or airlines that in the meantime have changed their name or have merged.

Aviation CMP Inc.

Airlines:
Adlair
Adventure Air
Aero Trades (Western)
Aerokon Aviation
Aéropro
Air Canada
Air Canada Jazz
Air Creebec
Air Dale (started as Airdale Flying Service and renamed in 1956 to Air Dale)
Air Exec Services
Air Gaspé (acquired by Quebecair in 1973)
Air Georgian
Air Inuit
Air Manitoba (formerly Ilford Riverton and Northland Air Manitoba)
Air Mikisew (formerly Contact Air)
Air Niagara
Air North
Air Nova (became part of Air Canada in 2001 and merged into Air Canada Jazz)
Air Ontario (became part of Air Canada in 2001 and merged into Air Canada Jazz)
Air Satellite
Air Spray (1967)
Air Tindi
Air Toronto
Air Transat
Air Wemindji
AirExpress Ontario
Airwave Transport
Airwest Airlines (merged with Air BC)
Aklak Air
Alberta Central Airways
Alberta Citylink
ALCI Aviation (Antarctic Logistics Center International)
All Canada Express
Arctic Air
Arctic Sunwest Charters
Arctic Wings (merged with Central Northern Airways into Transair)
Arctic Wings and Rotors
Associated Airways (Acquired by Pacific Western Airlines in 1955)
Athabaska Airways (merged with Air Sask (La Ronge Aviation) into Transwest Air)
Atlantic Central Airlines Ltd.
Austin Airways (merged with Air Ontario)
Aviation Boreal
Bayview Air Services
Bearskin Airlines
Beaver Air Spray
Blue Water Aviation Services
Bolton Lake Air Services
Bradley Air Services (Began operating scheduled passenger services under the name of First Air.)
British Columbia Airways
Buffalo Airways
Buffalo Narrows Airways (renamed Courtesy Air ca 1997)
Business Flights
Calm Air International
Can-West Air
Canada Jet Charters
Canadian Airlines International (acquired by Air Canada in 2001)
Canadian Pacific Air Lines - CPAL (aka CP Air; merged into Canadian Airlines 1987)
Canair Cargo
CanJet Airlines
Cargojet Airways
Central Mountain Air Services
Chilcotin Cariboo Aviation
Conair Aviation
Conifair Aviation
Contact Air (renamed Air Mikisew)
Courtesy Air (formerly named Buffalo Narrows Airways)
Crown Charter Services
Curtiss Reid Flying Services
Deraps Aviation
Dorval Air Transport
Eastern Provincial Airways (sold to CP Air & merged into Canadian Airlines)
Eldorado Aviation
Exact Air
FedEx / Morningstar Air Express
First Air (Bradley Air Services dba First Air)
Frontier Air
Gateway Aviation
Georgian Express
Gogal Air Service
Goose Bay Air Services
Great Northern Airways (bought by Trans North Turbo Air)
Harbour Air 
Hawkair Aviation Services
Huron Air
Ilford Riverton Airways (Renamed Northland Air Manitoba in 1986 and Air Manitoba in 1991)
Inuvik Coastal Airways
Jackson Air Service
Jetport Inc.
Keir Air Transport
Kelner Airways (name changed to Wasaya Airways)
Kelowna Flightcraft Air Charter
Kenn Borek Air
Kenting Atlas Aviation (formerly Kenting Aviation; operations taken over by Kenn Borek, 1975)
Kivalliq Air
La Ronge Aviation Services (merged with Athabaska into Transwest Air)
Labrador Airways (now dba Air Labrador)
Lambair
Laurentian Air Services
Liard Air
Little Red Air Service
Loon Air (Big River Air which did business as Loon-Air until about 2000)
Mackenzie Air
Maritime Central Airways
Max Aviation
Millardair
Missinippi Airways (Beaver Air Services dba Missinippi Airways)
Morningstar Air Express
Myrand Aviation
Nahanni Air Services (became North Wright Air and later North-Wright Airways)
Nakina Outpost Camps & Airservice
Nationair
National Aviation
Nolinor Aviation
Norcanair (aka North Canada Air; taken over by Time Air)
Nordair (merged into Canadian Airlines)
NorOntair
North American Airlines
North Cariboo Flying Service
North Coast Air Services
North-Wright Airways (formerly Nahanni Air Service)
Northern Thunderbird Air
Northern Wings
Northland Air Manitoba (formerly Ilford Riverton (1960); later renamed Air Manitoba in 1991)
Northway Aviation
Northwest Territorial Airways (aka NWT Air; merged into First Air)
Northwestern Air
Ontario Central Airlines (In 1984, the airline was renamed Nunasi-Central Airlines.)
Pacific Coastal Airlines
Pacific Western Airlines (merged into Canadian Airlines)
Pascan Aviation
Patricia Air Services
Peace Air
Perimeter Airlines (Inland) (merged with parent company Perimeter Aviation about 2004)
Perimeter Aviation
Pickle Lake Air Services
Points North Air Services
Propair
Provincial Airlines
Provincial Express
Ptarmigan Airways (bought by First Air)
Quebecair (merged into Canadian Airlines)
Queen Charlotte Airlines (sold to Pacific Western Airlines)
Regionnair
Reindeer Air Service
Rimouski Airlines (merged with Gulf Aviation to form Quebecair)
Royal Airlines
Sabourin Lake Airways
Seair Services 1990
Simpson Air
Skycharter
Skycraft Air Transport
Skylink Airlines
SkyLink Express
SkyNorth Air
Skyservice Airlines
Skyward Aviation 
Smithers Air Service
Sonicblue Airways (formerly known as Regency Express)
Sowind Air
St. Felicien Air Services
Stanair
Strait Air
Summit Air Charters
Superior Airways
Survair
Thunder Airlines
Trans Capital Air
Trans-Canada Air Lines - TCAL (became Air Canada in 1965)
Trans-Provincial Airlines (purchased in 1993 by Harbour Air)
TransAir (started as Central Northern Airways, renamed Transair 1956; sold to Pacific Western Airlines in 1979)
Transfair
Transwest Air
Trillium Air
Tyee Airlines
Voyageur Airways
Walsten Air Service
Wardair (sold to Canadian Airlines)
Wasaya Airways
West Coast Air
Western Arctic Air
Western Straits Air
Wheeler Airlines (taken over by Nordair, 1964)
White Pass Airways (aka British Yukon Navigation Company; sold to Yukon Southern Air Transport in December 1941)
Whiteshell Air Service
Wildcountry Airways
Wilderness Airline (acquired by Pacific Coastal Airlines [PCO/8P] in 1998)
World Wide Airways
Yukon Southern Air Transport (formerly known as United Air Transport)

Corporations:
Black Sheep Aviation & Cattle Company
Borealis Exploration
Brethour Realty Services
Chelsea Holdings Ltd.
Chevron Canada
Churchill Falls Co.
Comstock International
Guay Inc.
Hollinger Ungava Transport
Hydro-Quebec (Transport Aviation division of Hydro-Québec)
Lignum Ltd.
Lost River Mining Corp.
McInnes Products
Millar Western Industries
Panarctic Oils
Phaega Corporation
S & H Aviation Sales
St. Lawrence Construction Ltd.
Syncrude Canada Ltd
The Photographic Survey Co. Ltd.

Government:
British Columbia Forest Services
Canada Department of Transport
Gouvernement du Québec
Newfoundland & Labrador Forestry Service
Ontario Ministry of Natural Resources
RCMP-GRC Air Services
Saskatchewan Government Northern Air Operations
Transport Canada

Manufacturers:
Bombardier Aerospace
Canadair
de Havilland Canada

Military:
Canadian Armed Forces
Royal Canadian Air Force - RCAF

Organisations (non-profit):
Canairelief Air (Humanitarian aid alliance for Biafra)

Private:
D.G. Harris Productions
M.W. Ward

Special operations (survey, crop spraying etc.):
Aerial Photography Co. Ltd.
Flying Fireman
Fugro Aviation Canada
Geoterrex
Questor Surveys
Spartan Air Services