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:
Aer Arann
Aer Arann Express
Aer Lingus
Aer Turas
Air Contractors
CityJet
Interconair
Ryanair

Corporations:
Lancton Taverns Ltd.

Military:
Irish Air Corps