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

Return flights

30 Sep - 20 Oct	Wizz Air
30 Sep - 21 Oct	Wizz Air
30 Sep - 07 Oct	Wizz Air
29 Sep - 08 Oct	Wizz Air
29 Sep - 07 Oct	Wizz Air
23 Sep - 15 Oct	Brussels Airlines
22 Sep - 24 Sep	Brussels Airlines
24 Sep - 01 Oct	Brussels Airlines
22 Sep - 01 Oct	Brussels Airlines
22 Sep - 02 Oct	Brussels Airlines
27 Sep - 01 Oct	Brussels Airlines
29 Sep - 30 Sep	Wizz Air
19 Sep - 24 Sep	Brussels Airlines
22 Sep - 25 Sep	Brussels Airlines
19 Sep - 23 Sep	SWISS
20 Sep - 23 Sep	SWISS
20 Sep - 24 Sep	Brussels Airlines
18 Sep - 23 Sep	SWISS
19 Sep - 30 Sep	SWISS
19 Sep - 25 Sep	Brussels Airlines

Also check the deals for one-way flights from Warsaw 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 Warsaw to Lisbon in September from 148€

Return flights