Cheapest return flights from Oslo to Porto in September from $186

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

22 Sep - 26 Sep easyJet
17 Sep - 01 Oct Vueling Airlines
24 Sep - 01 Oct Ryanair
15 Sep - 01 Oct Vueling Airlines
17 Sep - 26 Sep Vueling Airlines
22 Sep - 01 Oct Norwegian direct
08 Sep - 13 Sep Volotea
24 Sep - 26 Sep Vueling Airlines
24 Sep - 01 Oct Norwegian direct
15 Sep - 26 Sep Vueling Airlines
15 Sep - 01 Oct Norwegian direct
17 Sep - 01 Oct Norwegian direct
22 Sep - 26 Sep Norwegian direct
08 Sep - 12 Sep Norwegian direct
10 Sep - 01 Oct Vueling Airlines
24 Sep - 26 Sep Norwegian direct
17 Sep - 03 Oct Vueling Airlines
15 Sep - 26 Sep Norwegian direct
10 Sep - 12 Sep Vueling Airlines
24 Sep - 03 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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