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:
Aero Technik
Airlink Luftverkehrs GmbH
Austria-Flugdienst
Austrian Air Services
Austrian Airlines
City-jet Luftfahrtgesellschaft
Eurowings Europe
Fly Tyrol
Jet24
Jetalliance Flugbetriebs
Lauda Air (merged into Austrian Airlines on 1 July 2012)
Niki
People's Viennaline
Skytaxi Luftfahrt
Tyrol Air Ambulance
Österreichische Luftverkehrs AG - ÖLAG (absorbed into Deutsche Lufthansa, 1939)

Corporations:
Grondmet Handels GmbH

Flying schools, Aeroclubs, Paraclubs:
Pink Aviation Services

Special operations (survey, crop spraying etc.):
Ärzteflugambulanz GmbH