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

Return flights

31 Dec - 26 Jan	Air France
31 Dec - 28 Jan	Air France
25 Dec - 29 Jan	Air France
26 Dec - 19 Jan	Delta
27 Dec - 27 Jan	Delta
27 Dec - 28 Jan	Delta
31 Dec - 31 Jan	LATAM Airlines Group
24 Dec - 26 Jan	Air France
30 Dec - 20 Jan	Turkish Airlines
29 Dec - 20 Jan	Turkish Airlines
25 Dec - 31 Dec	Air France
25 Dec - 29 Dec	Air France
26 Dec - 31 Dec	KLM
26 Dec - 29 Dec	KLM
24 Dec - 30 Dec	KLM
24 Dec - 31 Dec	KLM
26 Dec - 28 Dec	KLM
24 Dec - 28 Dec	KLM
25 Dec - 30 Dec	KLM
23 Dec - 29 Dec	Delta

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 801€

Return flights