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

Return flights

29 Sep - 17 Oct	Ryanair	direct
30 Sep - 03 Oct	Ryanair
17 Sep - 24 Sep	Ryanair
05 Sep - 15 Sep	Ryanair
23 Sep - 01 Oct	Ryanair
12 Sep - 15 Sep	Ryanair
05 Sep - 07 Sep	Ryanair
28 Sep - 08 Oct	Ryanair
29 Sep - 10 Oct	Ryanair	direct
30 Sep - 02 Oct	Ryanair
05 Sep - 08 Sep	Ryanair
17 Sep - 30 Sep	Ryanair
21 Sep - 24 Sep	Ryanair
26 Sep - 01 Oct	Ryanair
24 Sep - 01 Oct	Ryanair
07 Sep - 15 Sep	Ryanair
29 Sep - 03 Oct	Ryanair
26 Sep - 10 Oct	Ryanair	direct
16 Sep - 19 Sep	Ryanair
19 Sep - 24 Sep	Ryanair

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 $197

Return flights