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

Return flights

05 Sep - 19 Sep	Ryanair
05 Sep - 07 Sep	Ryanair
30 Sep - 04 Oct	easyJet
17 Sep - 21 Sep	Ryanair
10 Sep - 14 Sep	Ryanair
10 Sep - 17 Sep	TAP
17 Sep - 01 Oct	Ryanair
08 Sep - 17 Sep	Ryanair
12 Sep - 14 Sep	Ryanair
05 Sep - 30 Sep	Ryanair
24 Sep - 27 Sep	Ryanair
29 Sep - 20 Oct	Ryanair	direct
06 Sep - 15 Sep	TAP
29 Sep - 06 Oct	Ryanair	direct
12 Sep - 03 Oct	Ryanair	direct
20 Sep - 09 Oct	Ryanair
20 Sep - 07 Oct	Ryanair
20 Sep - 01 Oct	Ryanair
29 Sep - 03 Oct	Ryanair	direct
19 Sep - 06 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 191€

Return flights