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

Return flights

02 Dec - 14 Dec	TAP
10 Dec - 07 Jan	Royal Air Maroc
02 Dec - 28 Dec	Royal Air Maroc
05 Dec - 15 Dec	TAP
01 Dec - 09 Dec	GOL Linhas Aéreas
08 Dec - 18 Jan	Iberia
08 Dec - 21 Jan	Iberia
02 Dec - 09 Dec	Royal Air Maroc
09 Dec - 12 Jan	Royal Air Maroc
03 Dec - 30 Dec	Air Europa
10 Dec - 16 Dec	Royal Air Maroc
01 Dec - 08 Dec	GOL Linhas Aéreas
07 Dec - 15 Dec	Royal Air Maroc
16 Dec - 01 Jan	Air China
01 Dec - 15 Dec	Air China
10 Dec - 08 Jan	Royal Air Maroc
08 Dec - 12 Jan	Air China
13 Dec - 19 Jan	Air Europa
01 Dec - 12 Jan	Air Europa
16 Dec - 04 Jan	LATAM Airlines Group

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 669€

Return flights