Cheapest return flights from Porto to Oslo in September from 170€

AirHint found the following cheapest return flights from Porto (OPO) to Oslo (OSL) in September 2026 (see full year).

Return flights

16 Sep - 22 Sep Ryanair
11 Sep - 14 Sep KLM
02 Sep - 07 Sep KLM
16 Sep - 05 Oct Norwegian direct
18 Sep - 05 Oct Norwegian direct
02 Sep - 14 Sep Norwegian
02 Sep - 21 Sep Norwegian direct
02 Sep - 14 Sep Norwegian direct
11 Sep - 21 Sep Vueling Airlines
11 Sep - 02 Oct Vueling Airlines
02 Sep - 07 Sep Norwegian direct
09 Sep - 21 Sep Norwegian direct
09 Sep - 14 Sep Norwegian direct
16 Sep - 02 Oct Norwegian
18 Sep - 02 Oct Norwegian
11 Sep - 02 Oct Norwegian direct
16 Sep - 02 Oct Norwegian direct
18 Sep - 02 Oct Norwegian direct
27 Sep - 05 Oct Norwegian Air Sweden AOC
27 Sep - 16 Oct Norwegian Air Sweden AOC

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

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