Cheapest return flights from Keflavik to Porto in September from 270€

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

Return flights

03 Sep - 19 Sep easyJet
03 Sep - 10 Sep easyJet
10 Sep - 17 Sep KLM
12 Sep - 30 Sep easyJet
30 Sep - 14 Oct Vueling Airlines
30 Sep - 10 Oct Vueling Airlines
30 Sep - 03 Oct Vueling Airlines
12 Sep - 16 Sep Vueling Airlines
12 Sep - 03 Oct Vueling Airlines

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

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