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

Return flights

11 Sep - 17 Sep	Ryanair	direct
11 Sep - 13 Sep	Ryanair	direct
14 Sep - 17 Sep	Ryanair	direct
28 Sep - 09 Oct	Ryanair
28 Sep - 09 Oct	Ryanair	direct
28 Sep - 02 Oct	Ryanair
13 Sep - 17 Sep	Norwegian Air Sweden AOC	direct
14 Sep - 18 Sep	Ryanair	direct
28 Sep - 05 Oct	Ryanair
28 Sep - 06 Oct	Ryanair
11 Sep - 14 Sep	Ryanair
21 Sep - 25 Sep	Ryanair
20 Sep - 02 Oct	Air France
10 Sep - 13 Sep	Norwegian Air Sweden AOC	direct
27 Sep - 03 Oct	Ryanair
14 Sep - 25 Sep	Ryanair
24 Sep - 03 Oct	Ryanair
17 Sep - 24 Sep	Ryanair
25 Sep - 03 Oct	Ryanair
28 Sep - 05 Oct	Ryanair	direct

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.

Book a cheap hotel in Porto

Cheap car rent in Porto

Cheapest return flights from Stockholm to Porto in September from $139

Return flights