Avianca Brasil S.A., officially Oceanair Linhas Aéreas S/A, was a Brazilian airline based in Congonhas Airport in São Paulo, Brazil. According to the National Civil Aviation Agency of Brazil (ANAC), which cancelled its operation, prior to cessation of operations, from January to December 2018 Avianca Brasil had 13.4% of the domestic and 7.3% of the international market share in terms of passengers per kilometer flown, making it the fourth-largest airline both in domestic and international traffic in Brazil. The company slots were redistributed by Anac. An auction on 10 July 2019 raised R$555.3 million, not enough to pay a debt of R$2.7 billion, although Avianca's bankruptcy was not officially decreed.

The National Civil Aviation Agency, is the Brazilian civil aviation authority, created in 2005. It is headquartered in the Edifício Parque Cidade Corporate in Brasília. A part of the Brazilian Secretariat of Civil Aviation, the agency raised from the former Department of Civil Aviation (DAC) and the Civil Aviation Certification Division, the Brazilian aircraft certification authority. ANAC is responsible for regulating and overseeing civil aviation activities, aeronautics and aerodromes infrastructure.