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:
Air Sofia (Became FTO in 2007)
Air VIA
Balkan Bulgarian Airlines
BH Air
Bright Aviation Services
Bul Air
Bulair (a charter subsidiary of TABSO)
Bulgaria Air
Bulgarian Air Charter
Heli Air Services
Hemus Air (As of February 2009, all Hemus Air aircraft are operating for the parent company, Bulgaria Air)
Inter Trans Air
Scorpion Air
Sigi Air Cargo
TABSO (rebranded as Balkan Bulgarian Airlines, 1968)
Tayaran Jet
Varna International Airways (rebranded Air VIA)
Vega Airlines

Military:
Bulgarian Air Force

Special operations (survey, crop spraying etc.):
Air Mizia
Bask Air
Kapoly Air