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

Return flights

30 Sep - 07 Oct	easyJet
23 Sep - 25 Sep	Ryanair
10 Sep - 25 Sep	Vueling Airlines
05 Sep - 19 Sep	Ryanair
26 Sep - 29 Sep	Ryanair
06 Sep - 10 Sep	Ryanair
05 Sep - 26 Sep	Ryanair	direct
09 Sep - 15 Oct	Vueling Airlines
05 Sep - 07 Sep	Ryanair
25 Sep - 01 Oct	Ryanair
19 Sep - 22 Sep	Ryanair
17 Sep - 24 Sep	Ryanair
26 Sep - 28 Sep	Ryanair
29 Sep - 20 Oct	Ryanair	direct
15 Sep - 06 Oct	Ryanair	direct
29 Sep - 04 Oct	Vueling Airlines
02 Sep - 07 Oct	Ryanair
29 Sep - 13 Oct	Ryanair	direct
29 Sep - 06 Oct	Ryanair	direct
12 Sep - 03 Oct	Ryanair	direct

Also check the deals for one-way flights from Lisbon to Warsaw 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 Lisbon to Warsaw in September from $208

Return flights