LATAM Airlines Brasil, formerly TAM Airlines (Portuguese: TAM Linhas Aéreas), is the Brazilian brand of LATAM Airlines Group. The merger of TAM with LAN Airlines was completed on June 22, 2012. The company is currently the largest Brazilian airline by market share and fleet size, though it is not Brazil's official flag carrier.

Before the takeover, TAM was Brazil's and Latin America's largest airline. Its headquarters are in São Paulo, operating scheduled services to destinations within Brazil, as well as international flights to Europe and other parts of North and South America. Shares in the company were traded on the São Paulo Exchange (BM&F Bovespa) and as "TAM". Prior to the merger with LAN, the company closed its capital, transferring its shares to LATAM Airlines Group. However, in August 2015, it was announced that the two airlines would fully rebrand as LATAM, with one livery to be applied on all aircraft by 2018.

According to the National Civil Aviation Agency of Brazil (ANAC), between January and December 2015 LATAM had 36.7% of the domestic and 78.5% of the international market shares in terms of passengers per kilometer flown, making it the largest airline in Brazil.

The airline withdrew from the Star Alliance and joined Oneworld effective March 31, 2014.

TAM – Táxi Aéreo Marília and TAM – Transportes Aéreos Regionais were two different entities, although both belonged to the TAM Group. TAM – Marília, an air taxi company founded in 1961, provided the start-up infrastructure for TAM – Regionais.

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