AirHint found the following cheapest return flights from Gdansk (GDN) to Lisbon (LIS) in September 2025 (see full year).

Return flights

30 Sep - 07 Oct	Ryanair
16 Sep - 24 Sep	Wizz Air
16 Sep - 23 Sep	Wizz Air
10 Sep - 24 Sep	Wizz Air
20 Sep - 26 Sep	Ryanair
23 Sep - 26 Sep	Ryanair
21 Sep - 23 Sep	Wizz Air
30 Sep - 08 Oct	Ryanair
16 Sep - 20 Sep	Wizz Air
29 Sep - 03 Oct	Ryanair
17 Sep - 24 Sep	Wizz Air
02 Sep - 09 Sep	Wizz Air
10 Sep - 17 Sep	Ryanair
26 Sep - 04 Oct	Ryanair
25 Sep - 04 Oct	Wizz Air
26 Sep - 05 Oct	Ryanair
20 Sep - 04 Oct	KLM

Also check the deals for one-way flights from Gdansk 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 Gdansk to Lisbon in September from $177

Return flights