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

Return flights

04 Dec - 07 Dec	Air Canada
04 Dec - 08 Dec	Air Canada
01 Dec - 09 Dec	Air Canada
01 Dec - 08 Dec	Air Canada
03 Dec - 21 Jan	GOL Linhas Aéreas
12 Dec - 09 Jan	Air Canada
01 Dec - 31 Dec	TAP
11 Dec - 19 Jan	SWISS
08 Dec - 19 Jan	GOL Linhas Aéreas
01 Dec - 19 Jan	SWISS
12 Dec - 26 Jan	TAP
12 Dec - 23 Jan	SWISS
09 Dec - 14 Jan	SWISS
08 Dec - 05 Jan	TAP
09 Dec - 14 Jan	LATAM Airlines Group	direct
14 Dec - 28 Dec	LATAM Airlines Group	direct
02 Dec - 16 Dec	British Airways	direct
01 Dec - 16 Dec	British Airways	direct
05 Dec - 08 Dec	Iberia
08 Dec - 16 Dec	British Airways	direct

Also check the deals for one-way flights from Sao Paulo to London 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 Sao Paulo to London in December from 568€

Return flights