American, Delta, British and Iberia are running promotional fares to Brazil during Carnival - 8th Feb til 12th Feb. The flights are around 599€. Flights with American and Delta are done through the US, and from Iberia and British direct from Europe. If you choose one of the North American airlines you will be able to accrual around 17,000 miles for a roundtrip between Amsterdam and Rio de Janeiro (connecting through London, then JFK). Departure cities are: London, Amsterdam, Paris and Madrid.