Cheapest return flights from Porto to Keflavik in August from $377

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

Return flights

16 Aug - 21 Aug KLM
21 Aug - 31 Aug KLM
16 Aug - 23 Aug KLM
20 Aug - 27 Aug SWISS
21 Aug - 30 Aug KLM
17 Aug - 25 Aug SWISS
26 Aug - 29 Aug Norwegian
01 Aug - 10 Aug Ryanair
04 Aug - 11 Aug Ryanair
10 Aug - 23 Aug Transavia France
26 Aug - 12 Sep Vueling Airlines

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

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