AirHint found the following cheapest return flights from Stockholm (ARN) to Porto (OPO) in September 2025 (see full year).

Return flights

28 Sep - 02 Oct	TAP
23 Sep - 08 Oct	Transavia France
27 Sep - 01 Oct	Air France
27 Sep - 02 Oct	Ryanair
21 Sep - 24 Sep	TAP
24 Sep - 30 Sep	Ryanair
17 Sep - 02 Oct	Ryanair
30 Sep - 04 Oct	Ryanair
28 Sep - 05 Oct	Ryanair
21 Sep - 25 Sep	Ryanair
20 Sep - 27 Sep	Ryanair
17 Sep - 18 Sep	Ryanair
17 Sep - 19 Sep	Ryanair
18 Sep - 24 Sep	Ryanair
17 Sep - 21 Sep	Ryanair
17 Sep - 22 Sep	Ryanair
25 Sep - 30 Sep	Ryanair
29 Sep - 09 Oct	Vueling Airlines
28 Sep - 02 Oct	Ryanair	direct
29 Sep - 16 Oct	Vueling Airlines

Also check the deals for one-way flights from Stockholm to Porto 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 Stockholm to Porto in September from 152€

Return flights