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

Return flights

02 Dec - 29 Jan	TAP	direct
02 Dec - 09 Dec	TAP	direct
06 Dec - 25 Dec	TAP	direct
13 Dec - 27 Jan	TAP	direct
13 Dec - 20 Jan	TAP	direct
08 Dec - 16 Jan	Azul Airlines
13 Dec - 17 Jan	TAP	direct
23 Dec - 07 Jan	LATAM Airlines Group
16 Dec - 01 Jan	TAP	direct
23 Dec - 01 Jan	TAP	direct
27 Dec - 22 Jan	TAP	direct
13 Dec - 27 Dec	TAP	direct
23 Dec - 27 Jan	TAP	direct
08 Dec - 29 Dec	LATAM Airlines Group
23 Dec - 30 Dec	TAP	direct
02 Dec - 11 Dec	TAP
18 Dec - 25 Dec	Azul Airlines
20 Dec - 30 Dec	TAP	direct
12 Dec - 30 Dec	TAP
11 Dec - 15 Dec	GOL Linhas Aéreas

Also check the deals for one-way flights from Porto Alegre to Lisbon 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 Lisbon in December from $847

Return flights