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.

Airlines:
Adastra Airways (purchased by East-West Airlines)
Advance Airlines
Aero-Tropics Air Services
Air Express
Air North Queensland
Airlines of New South Wales (renamed Ansett Airlines of NSW)
Airlines of Tasmania
Airnorth
Airtex Aviation
Ansett Airlines of Australia (became Ansett Australia Airlines)
Ansett Airlines of Papua New Guinea
Ansett Airways (became Ansett-ANA after merger with Ansett Airways)
Ansett Australia Airlines (ceased operations)
Ansett Flying Boat Service
Ansett-ANA (renamed Ansett Airlines of Australia)
Associated Airlines of Australia (presumably ceased opeations about 1999)
Aurukun Air Services
Australian National Airways - ANA (became Ansett-ANA after merger with Ansett Airways)
Barrier Reef Airways
British Commonwealth Pacific Airways
Broome Aviation
Bush Pilots Airways (becane Air Queensland)
Butler Air Transport (renamed Queensland Airines, and later Airlines of New South Wales)
Cape York Airlines
Central Air
Cockatoo Island Airways
Connair
Corporate Air (Australia)
Eagle Airways
East West Airlines (operations absorbed by Ansett in 1993)
Fawcett Aviation Service
Flight Safety Australia
Gibbes Sepik Airways (acquired by Mandated Airlines)
Guinea Air Traders (merged into Airlines of South Australia)
Guinea Airways Pty Ltd. (purchased by Ansett in 1959 and renamed Airlines of South Australia (ASA) 1960)
Hardy Aviation
Hazelton Airlines (merged with Kendell into Regional Express)
Impulse Airlines (absorbed into QantasLink group, 2001)
Island Air Gold Coast
Jetcraft
Kendell Airlines (merged with Hazelton Airlines into Regional Express)
MacRobertson Miller Airlines (absorbed by Ansett in 1993)
Mandated Air Lines (continued as Ansett-MAL, 1961 and later Ansett Airlines of Papua New Guinea)
Moore's Air Charter
National Jet Systems
Network Aviation Australia
New Holland Airways
Pacific Aviation
Pan-Air
Papuan Airlines (renamed Ansett (P&NG) in 1972)
Pel-Air
Qantas
QantasLink
Queensland Airlines (renamed Airlines of New South Wales)
Skytraders
Skywest Airlines (Australia)
South Pacific Airmotive
Stephens Aviation
Sunshine Express Airlines
Tamair (presumably ceased opeations about 1999)
Tiger Airways Australia
Trans Australia Airlines - TAA
Trans Oceanic Airways
Transair Australia
Unionair
Uzu Air

Corporations:
Australian Iron & Steel
Ellyou Goldfields Development Corp.
John Fairfax & Sons
Snowy Mountains Hydro Electric Authority

Flying schools, Aeroclubs, Paraclubs:
Sydney Skydivers Parachuting School

Government:
Australian Department of Civil Aviation

Manufacturers:
Government Aircraft Factories - GAF (reorganised and renamed as Aerospace Technologies of Australia (ASTA))

Military:
Allied Directorate of Air Transport (ADAT)
Royal Australian Air Force - RAAF
Royal Australian Army

Private:
Mr A. McVinish
W.R. Carpenter

Special operations (survey, crop spraying etc.):
Adastra Aerial Surveys (acquired by Qasco (Queensland Aerial Survey Company Pty Ltd))
Royal Flying Doctor Service