AirHint found the following cheapest return flights from Rio De Janeiro (SDU) to London (LHR) in December 2025 (see full year).

Return flights

01 Dec - 28 Dec	LATAM Airlines Group
01 Dec - 25 Dec	LATAM Airlines Group
20 Dec - 25 Jan	LATAM Airlines Group
20 Dec - 11 Jan	LATAM Airlines Group
18 Dec - 08 Jan	LATAM Airlines Group
24 Dec - 03 Jan	LATAM Airlines Group
29 Dec - 19 Jan	LATAM Airlines Group
18 Dec - 03 Jan	LATAM Airlines Group
20 Dec - 06 Jan	LATAM Airlines Group
01 Dec - 27 Dec	LATAM Airlines Group
19 Dec - 03 Jan	LATAM Airlines Group
03 Dec - 14 Dec	LATAM Airlines Group
01 Dec - 08 Dec	Azul Airlines
04 Dec - 29 Dec	Azul Airlines
09 Dec - 28 Jan	Azul Airlines
14 Dec - 29 Dec	Azul Airlines
02 Dec - 10 Dec	Azul Airlines
28 Dec - 12 Jan	United
03 Dec - 10 Dec	Azul Airlines
08 Dec - 22 Dec	Azul Airlines

Also check the deals for one-way flights from Rio De Janeiro 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 Rio De Janeiro to London in December from $949

Return flights