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:
Aerial Tours (renamed Douglas Airways)
Air Niugini
Air Sanga
Airlines PNG (Bought some assets of defunct Milne Bay Air incl IATA code CG.)
Airlink
Bougair (North Solomons Air Services dba Bougair)
Cloudlands Aviation Development
Co-Air
Douglas Airways (previously named Aerial Tours)
Goroka Air Services
Heli Niugini
Heron Air Charter
Hevilift
Island Airways Ltd.
Islands Nationair
Kiunga Aviation
LinkPNG (Subsidiary of Air Niugini)
Milne Bay Air (Defunct; went into liquidation. Some assets bought by Airlines PNG incl IATA code CG)
North Coast Aviation
PNG Air (renamed from Airlines PNG to PNG Air in November 2015)
Provincial Air Services
Provincial Air Transport
Regional Air
Southwest Air
Sunbird Aviation PNG
Talair
Trans Air
Transniugini Airways
Tropicair
Vanimo Trading (aka Vanair; Division of Garamut Exploration)

Corporations:
Bulolo Gold Dredging Co
Curtain Brothers PNG
Rimbunan Hijau

Military:
Papua New Guinea Defence Force

Organisations (non-profit):
MAF PNG - Mission Aviation Fellowship