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

Return flights

30 Sep - 03 Oct	Ryanair
17 Sep - 24 Sep	Ryanair
22 Sep - 01 Oct	Ryanair
16 Sep - 24 Sep	Ryanair
23 Sep - 24 Sep	Ryanair
20 Sep - 26 Sep	Ryanair
23 Sep - 03 Oct	Ryanair
24 Sep - 30 Sep	Ryanair
19 Sep - 26 Sep	Ryanair
17 Sep - 20 Sep	Ryanair
19 Sep - 24 Sep	Ryanair
05 Sep - 07 Sep	Ryanair
16 Sep - 19 Sep	Ryanair
29 Sep - 10 Oct	Ryanair
22 Sep - 10 Oct	Ryanair	direct
29 Sep - 17 Oct	Ryanair	direct
26 Sep - 10 Oct	Ryanair	direct
22 Sep - 02 Oct	Ryanair
29 Sep - 07 Oct	Ryanair
25 Sep - 03 Oct	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 161€

Return flights