At this moment some good options from Europe to Brazil based on various carriers are available. Consider service of KLM / Air France and Alitalia, TAM Airlines or Turkish Airlines to book cheap return flights from various European citiesto Brazil now already from €369! The cheapest options are round trip flights from Brussels or Luxembourg to Sao Paulo or Rio de Janeiro. Another option could be an open jaw tickets from Benelux to Brazil with return back to UK (London, Manchester, Edinburgh etc.) already for £278.
Travel options vary by each origin and airline but in general you may find these flights to Brazil between November 2015 till June 2016. To check the cheapest connection possibilities we recommend to use service of Skyscanner. This tool gives you quickly an idea which low-cost airlines are connecting these European cities from your hometown.
Booking samples
KLM / Air France / Alitalia
Benelux - Brazil - UK from £284 (travel option to visit Carnival in Rio 5.-9.2.2016)
Luxembourg - Rio de Janeiro from €383 (travel option to visit Carnival in Rio 5.-9.2.2016)
TAM Airlines
TAP Portugal or Turkish Airlines
Booking sample of cheap flights to South America from Europe for €369 here. In this case you would be departing from Luxembourg to Rio de Janeiro on 28th of February 2016. Your return flight from Rio de Janeiro back to Europe would take place on 20th of March 2016.