AirHint found the following cheapest return flights from Porto Alegre (POA) to London (LHR) in December 2025 (see full year).

Return flights

09 Dec - 30 Dec	LATAM Airlines Group
10 Dec - 21 Jan	Lufthansa
12 Dec - 20 Jan	Azul Airlines
10 Dec - 20 Jan	Azul Airlines
11 Dec - 20 Jan	LATAM Airlines Group
14 Dec - 20 Jan	GOL Linhas Aéreas
07 Dec - 13 Jan	LATAM Airlines Group
16 Dec - 02 Jan	LATAM Airlines Group
10 Dec - 19 Jan	Azul Airlines
17 Dec - 31 Dec	Azul Airlines
14 Dec - 28 Dec	SWISS
18 Dec - 31 Dec	Azul Airlines
25 Dec - 01 Jan	Lufthansa
07 Dec - 14 Dec	LATAM Airlines Group
06 Dec - 13 Dec	TAP
20 Dec - 03 Jan	Lufthansa

Also check the deals for one-way flights from Porto Alegre 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 Porto Alegre to London in December from $861

Return flights