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

Return flights

04 Dec - 07 Dec	TAP
02 Dec - 07 Dec	TAP
03 Dec - 16 Jan	TAP
09 Dec - 22 Jan	TAP
09 Dec - 19 Jan	TAP
09 Dec - 21 Jan	TAP
08 Dec - 20 Jan	TAP
08 Dec - 29 Jan	LATAM Airlines Group
06 Dec - 31 Jan	TAP
01 Dec - 31 Jan	TAP
06 Dec - 31 Dec	TAP
11 Dec - 31 Dec	TAP
09 Dec - 30 Dec	TAP
04 Dec - 08 Dec	TAP
02 Dec - 09 Dec	TAP
01 Dec - 08 Dec	TAP
03 Dec - 09 Dec	TAP
02 Dec - 04 Dec	TAP
15 Dec - 13 Jan	Iberia
10 Dec - 31 Jan	TAP

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 $757

Return flights