Cheapest return flights from Oslo to Porto in September from $209

Best time to book flights for Oslo (OSL) to Porto (OPO) flights at AirHint

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

Return flights

26 Sep - 28 Sep Volotea
24 Sep - 26 Sep Norwegian
24 Sep - 15 Oct Vueling Airlines
17 Sep - 24 Sep Vueling Airlines
15 Sep - 24 Sep Vueling Airlines
24 Sep - 01 Oct Vueling Airlines
17 Sep - 01 Oct Vueling Airlines
20 Sep - 24 Sep Vueling Airlines
15 Sep - 01 Oct Vueling Airlines
08 Sep - 10 Sep Norwegian Air Sweden AOC
08 Sep - 24 Sep Norwegian Air Sweden AOC
20 Sep - 01 Oct Vueling Airlines
24 Sep - 01 Oct Norwegian direct
01 Sep - 03 Sep Norwegian Air Sweden AOC
08 Sep - 10 Sep Norwegian direct
08 Sep - 24 Sep Norwegian direct
24 Sep - 10 Oct Vueling Airlines
24 Sep - 08 Oct Vueling Airlines
17 Sep - 08 Oct Vueling Airlines
13 Sep - 01 Oct Vueling Airlines

Also check the deals for one-way flights from Oslo to Porto in September.

Skyscanner

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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