AirHint found the following cheapest return flights from London (LON) to Sao Paulo (GRU) in December 2025 (see full year).

Return flights

02 Dec - 07 Dec	Ryanair
03 Dec - 10 Dec	Ryanair
01 Dec - 11 Dec	Ryanair
01 Dec - 09 Dec	Vueling Airlines
05 Dec - 07 Dec	Norse Atlantic Airways (UK)
01 Dec - 07 Dec	Royal Air Maroc
01 Dec - 10 Dec	Ryanair
05 Dec - 11 Dec	Norse Atlantic Airways (UK)
02 Dec - 08 Dec	ITA Airways
04 Dec - 11 Dec	Ryanair
31 Dec - 27 Jan	Ryanair
04 Dec - 28 Jan	ITA Airways
06 Dec - 26 Jan	ITA Airways
13 Dec - 21 Jan	ITA Airways
11 Dec - 29 Jan	ITA Airways
11 Dec - 19 Jan	Air Canada
13 Dec - 31 Jan	ITA Airways
08 Dec - 14 Jan	Norse Atlantic Airways (UK)
29 Dec - 26 Jan	Air Europa
04 Dec - 20 Jan	Ryanair

Also check the deals for one-way flights from London to Sao Paulo in December.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from London to Sao Paulo in December from 642€

Return flights