Cheapest return flights from Porto to Keflavik in September from $210

Best time to book flights for Porto (OPO) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Porto (OPO) to Keflavik (KEF) in September 2025 (see full year).

Return flights

04 Sep - 14 Sep Fly Play direct
04 Sep - 07 Sep Fly Play direct
23 Sep - 28 Sep easyJet
11 Sep - 21 Sep Fly Play direct
18 Sep - 28 Sep Fly Play direct
20 Sep - 30 Sep easyJet
23 Sep - 30 Sep easyJet
26 Sep - 07 Oct Ryanair
24 Sep - 06 Oct Ryanair
11 Sep - 18 Sep Fly Play direct
04 Sep - 18 Sep Fly Play direct
01 Sep - 05 Sep Vueling Airlines
25 Sep - 02 Oct Fly Play
21 Sep - 02 Oct Transavia France
28 Sep - 09 Oct easyJet
28 Sep - 09 Oct Fly Play direct
21 Sep - 02 Oct Fly Play direct

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