Avianca Brazil (Portuguese: Avianca Brasil), officially Oceanair Linhas Aéreas S/A, is a Brazilian airline based in São Paulo, Brazil. It operates passenger services from 25 destinations. Its main bases are Brasília and São Paulo-Guarulhos airports.

Even though the legal name of the airline remains OceanAir, it has been re-branded as Avianca since it is owned by Synergy Group, which owns Avianca Holdings. Avianca (Colombia) and Avianca Brazil remain separate legal entities, but in February 2017, CAPA reports that Avianca Holdings plans to obtain necessary regulatory approvals to fold Avianca Brazil into Avianca Holdings.

Its CEO is José Efromovich, who is the younger brother of Germán Efromovich.

According to the National Civil Aviation Agency of Brazil (ANAC), between January and December 2015 Avianca Brazil had 9.4% of the domestic and 0.1% of the international market shares in terms of passengers per kilometer flown, making it the fourth largest airline in Brazil, after LATAM Brasil, Gol, and Azul.

The airline was established in 1998 as an air taxi company to operate services for oil companies in the Campos Basin. Its name was then OceanAir and began to operate scheduled services in 2002, between São Paulo, Rio de Janeiro, Macaé and Campos. Soon afterwards, it started to become better known to the public with a flight (no longer operated now) connecting Congonhas Airport in São Paulo and Santos Dumont Airport in Rio de Janeiro via São Paulo-Guarulhos International Airport, enabling international passengers from both cities easy access to the country's largest international hub from those cities' smaller but central and more convenient airports. At the time, OceanAir's fare between São Paulo's airports was cheaper than a taxi and on a par with a luxury bus ride.

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