Cheapest return flights from Porto to Keflavik in September from $244

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

Return flights

08 Sep - 15 Sep easyJet
16 Sep - 29 Sep Ryanair
21 Sep - 29 Sep easyJet
19 Sep - 27 Sep easyJet
05 Sep - 13 Sep easyJet
05 Sep - 10 Oct easyJet
09 Sep - 15 Sep Ryanair
19 Sep - 28 Sep easyJet
17 Sep - 27 Sep easyJet
19 Sep - 26 Sep Ryanair
03 Sep - 08 Oct KLM
05 Sep - 12 Sep easyJet
02 Sep - 07 Oct Ryanair
04 Sep - 09 Oct easyJet
19 Sep - 07 Oct Vueling Airlines
29 Sep - 14 Oct TAP

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

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