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:
Avisto (became a brokerage company only)
Balair (merged with CTA into BalairCTA)
Crossair (initially named Business Flyers Basle; named Crossair in 1978; became Swiss International Air Lines in 2002)
easyJet Switzerland
Fred-Air
Globe Air
Ju-Air
Laret Aviation
SA de Transport Aérien - SATA
Swiss European Air Lines (subsidiary of Swiss International Air Lines)
Swiss International Air Lines (initially named Business Flyers Basle; named Crossair in 1978; became Swiss International Air Lines in 2002)
Swiss Private Aviation
Swissair
Vodavia
Zimex Aviation

Corporations:
Fidinam Fiduciara
Trans Commerce Leasing