AirHint found the following cheapest return flights from Porto Alegre (POA) to Lisbon (LIS) in September 2026 (see full year).
Return flights
| 23 Sep - 01 Oct | TAP | direct | |
| 02 Sep - 17 Sep | TAP | direct | |
| 16 Sep - 24 Sep | TAP | direct | |
| 01 Sep - 12 Sep | Azul Airlines | ||
| 15 Sep - 01 Oct | Azul Airlines | ||
| 18 Sep - 26 Sep | TAP |
Also check the deals for one-way flights from Porto Alegre to Lisbon in September.
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