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

Return flights

24 Sep - 14 Oct	Vueling Airlines
24 Sep - 07 Oct	Vueling Airlines
24 Sep - 09 Oct	Vueling Airlines
23 Sep - 30 Sep	Vueling Airlines
30 Sep - 03 Oct	Ryanair
18 Sep - 23 Sep	Vueling Airlines
19 Sep - 23 Sep	Ryanair
24 Sep - 15 Oct	Vueling Airlines
24 Sep - 03 Oct	Vueling Airlines
26 Sep - 14 Oct	Vueling Airlines
26 Sep - 07 Oct	Vueling Airlines
26 Sep - 15 Oct	Vueling Airlines
22 Sep - 26 Sep	Ryanair
26 Sep - 29 Sep	Ryanair
19 Sep - 22 Sep	Ryanair
26 Sep - 09 Oct	Vueling Airlines
16 Sep - 19 Sep	Ryanair
15 Sep - 18 Sep	Ryanair
08 Sep - 15 Sep	Ryanair
17 Sep - 20 Sep	Ryanair

Also check the deals for one-way flights from Santander 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 Santander to Lisbon in September from $142

Return flights