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

Return flights

22 Sep - 23 Sep	Vueling Airlines
11 Sep - 23 Sep	Vueling Airlines
22 Sep - 24 Sep	Vueling Airlines
15 Sep - 23 Sep	Vueling Airlines
11 Sep - 24 Sep	Vueling Airlines
15 Sep - 24 Sep	Vueling Airlines
22 Sep - 25 Sep	Vueling Airlines
03 Sep - 23 Sep	Vueling Airlines
17 Sep - 20 Sep	Vueling Airlines
11 Sep - 25 Sep	Vueling Airlines
22 Sep - 06 Oct	Vueling Airlines
20 Sep - 06 Oct	Vueling Airlines
15 Sep - 06 Oct	Vueling Airlines

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 124€

Return flights