Cargo airlines (or airfreight carriers, and derivatives of these names) are airlines mainly dedicated to the transport of cargo by air. Some cargo airlines are divisions or subsidiaries of larger passenger airlines.
In 2018, Airline Cargo Traffic represented 262,333 millions tonne-kilometres with a 49.3% load factor: 52.1% for dedicated Cargo Operations, and 47.9% within Mixed Operations (belly freight of passenger airliners).