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

Return flights

24 Sep - 30 Sep	Ryanair
17 Sep - 21 Sep	Ryanair
08 Sep - 30 Sep	Vueling Airlines
20 Sep - 23 Sep	Ryanair
20 Sep - 24 Sep	Ryanair
23 Sep - 25 Sep	Ryanair
23 Sep - 27 Sep	Ryanair
16 Sep - 20 Sep	Vueling Airlines
22 Sep - 06 Oct	Ryanair
01 Sep - 30 Sep	Vueling Airlines
08 Sep - 25 Sep	Vueling Airlines
20 Sep - 03 Oct	Ryanair

Also check the deals for one-way flights from Lisbon to Vilnius 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 Vilnius in September from $186

Return flights