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.

Jorge Newbery Airfield, commonly known as Aeroparque, is an international airport 2 km (1.2 mi) northwest of downtown Buenos Aires, Argentina. The airport covers an area of 138 hectares and is operated by Aeropuertos Argentina 2000 S.A. It is located along the Río de la Plata, in the Palermo neighbourhood, and serves as the main hub for domestic flights in Argentina and South American destinations.