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

Return flights

11 Sep - 28 Sep	Ryanair	direct
18 Sep - 28 Sep	Ryanair	direct
24 Sep - 28 Sep	Ryanair
23 Sep - 28 Sep	Ryanair
25 Sep - 28 Sep	Ryanair
17 Sep - 26 Sep	Ryanair
17 Sep - 27 Sep	Ryanair
26 Sep - 28 Sep	Ryanair
11 Sep - 21 Sep	Ryanair	direct
13 Sep - 20 Sep	Norwegian Air Sweden AOC
17 Sep - 06 Oct	Norwegian Air Sweden AOC
17 Sep - 08 Oct	Norwegian Air Sweden AOC
24 Sep - 06 Oct	Norwegian
29 Sep - 02 Oct	Ryanair
24 Sep - 13 Oct	Norwegian
28 Sep - 02 Oct	Ryanair
24 Sep - 15 Oct	Norwegian
17 Sep - 01 Oct	Norwegian Air Sweden AOC
24 Sep - 08 Oct	Norwegian
13 Sep - 01 Oct	Norwegian Air Sweden AOC

Also check the deals for one-way flights from Porto to Stockholm 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 Porto to Stockholm in September from 108€

Return flights