AirHint found the following cheapest return flights from Porto Alegre (POA) to Lisbon (LIS) in September 2026 (see full year).

Return flights

24 Sep - 01 Oct	TAP	direct
10 Sep - 26 Sep	Azul Airlines
10 Sep - 01 Oct	GOL Linhas Aéreas
11 Sep - 02 Oct	GOL Linhas Aéreas
13 Sep - 24 Sep	Azul Airlines
13 Sep - 01 Oct	LATAM Airlines Group
24 Sep - 10 Oct	TAP	direct
13 Sep - 24 Sep	TAP	direct
13 Sep - 01 Oct	TAP	direct
10 Sep - 17 Sep	TAP	direct
10 Sep - 01 Oct	TAP	direct
01 Sep - 12 Sep	Azul Airlines
23 Sep - 30 Sep	TAP
21 Sep - 02 Oct	Azul Airlines
11 Sep - 18 Sep	Azul Airlines
14 Sep - 02 Oct	Azul Airlines
12 Sep - 27 Sep	Azul Airlines
03 Sep - 10 Sep	Azul Airlines
05 Sep - 20 Sep	LATAM Airlines Group
24 Sep - 09 Oct	TAP

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

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 September from 862€

Return flights