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

Return flights

30 Sep - 05 Oct	Ryanair
24 Sep - 01 Oct	Ryanair
23 Sep - 30 Sep	Ryanair
24 Sep - 27 Sep	KLM
24 Sep - 28 Sep	Ryanair
25 Sep - 02 Oct	Ryanair
23 Sep - 12 Oct	Vueling Airlines
25 Sep - 29 Sep	Ryanair
25 Sep - 28 Sep	Ryanair
23 Sep - 05 Oct	Vueling Airlines
27 Sep - 04 Oct	Ryanair
29 Sep - 04 Oct	Ryanair
29 Sep - 19 Oct	Norwegian
23 Sep - 13 Oct	Vueling Airlines
28 Sep - 05 Oct	Air Europa
26 Sep - 28 Sep	Ryanair
27 Sep - 29 Sep	Ryanair
22 Sep - 27 Sep	Ryanair
22 Sep - 29 Sep	Ryanair
21 Sep - 28 Sep	easyJet

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 155€

Return flights