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

Return flights

13 Aug - 05 Sep	LATAM Airlines Group
12 Aug - 19 Aug	GOL Linhas Aéreas
03 Aug - 19 Aug	Azul Airlines
12 Aug - 23 Aug	GOL Linhas Aéreas
02 Aug - 26 Aug	GOL Linhas Aéreas
12 Aug - 14 Sep	GOL Linhas Aéreas
10 Aug - 19 Aug	TAP	direct
14 Aug - 02 Sep	TAP	direct
14 Aug - 11 Sep	TAP	direct
07 Aug - 04 Sep	TAP	direct
14 Aug - 16 Sep	Azul Airlines
05 Aug - 30 Sep	Azul Airlines
01 Aug - 29 Aug	LATAM Airlines Group
10 Aug - 30 Aug	Azul Airlines
08 Aug - 19 Aug	GOL Linhas Aéreas
01 Aug - 28 Aug	GOL Linhas Aéreas
06 Aug - 19 Aug	TAP	direct
19 Aug - 03 Sep	LATAM Airlines Group
18 Aug - 01 Sep	LATAM Airlines Group
19 Aug - 23 Sep	LATAM Airlines Group

Also check the deals for one-way flights from Porto Alegre to Lisbon in August.

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Cheapest return flights from Porto Alegre to Lisbon in August from $876

Return flights