A great number of airlines and air forces from several countries included the Douglas DC-6 in their fleets at some point in time. Today most DC-6s are inactive, stored, or preserved in museums; although a number are still flying in northern bush operations in Alaska and Canada, while several are based in Europe and a few other DC-6s are still in operation for small carriers in South America.
Below are listed known operators of this airplane, both past and present (♠ indicate Original operators).
Iberia, legally incorporated as Iberia Líneas Aéreas de España, S.A. Operadora, Sociedad Unipersonal, is the flag carrier of Spain. Founded in 1927 and based in Madrid, it operates an international network of services from its main base of Madrid–Barajas Airport. Iberia, with Iberia Regional and with Iberia Express, is a part of International Airlines Group. In addition to transporting passengers and freight, Iberia Group carries out related activities, such as aircraft maintenance, handling in airports, IT systems and in-flight catering. Iberia Group airlines fly to over 109 destinations in 39 countries, and a further 90 destinations through code-sharing agreements with other airlines.
Cielos del Sur S.A., operating as Austral Líneas Aéreas, more commonly known by its shortened name Austral, was a domestic airline of Argentina, the sister company of Aerolíneas Argentinas. It was the second-largest domestic scheduled airline in the country, after Aerolíneas Argentinas. As a subsidiary of Aerolíneas Argentinas, the company shared its headquarters with that airline, which is located in the Aeroparque Jorge Newbery of Buenos Aires, the main base of operations of the company.
Líneas Aéreas Privadas Argentinas, more commonly known by the acronym LAPA, was an airline based in Buenos Aires, Argentina. At its heyday, the carrier operated international services to the United States and Uruguay, as well as an extensive domestic network within Argentina. Additionally, the company also operated charter services. Domestic and regional flights were operated from downtown's Aeroparque Jorge Newbery, whereas an international service to Atlanta was operated from Ministro Pistarini International Airport. LAPA was the first carrier to break a monopolistic market controlled by Aerolíneas Argentinas and its sister company Austral Líneas Aéreas, offering competitive prices.
The Curtiss C-46 Commando is a low-wing, twin-engine aircraft derived from the Curtiss CW-20 pressurized high-altitude airliner design. Early press reports used the name "Condor III" but the Commando name was in use by early 1942 in company publicity. It was used primarily as a cargo aircraft during World War II, with fold-down seating for military transport and some use in delivering paratroops. Mainly deployed by the United States Army Air Forces, it also served the U.S. Navy/Marine Corps, which called it R5C. The C-46 filled similar roles as its Douglas-built counterpart, the C-47 Skytrain, with some 3,200 C-46s produced to approximately 10,200 C-47s.
Transportes Aéreos del Mercosur S.A, d/b/a LATAM Airlines Paraguay, is the flag carrier and the national airline of Paraguay with its headquarters in Asunción, Paraguay. Its flights operate from Silvio Pettirossi International Airport in Asunción. Its parent company is LATAM Airlines Group.