Cheapest return flights from Porto to Keflavik in September from $260

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

25 Sep - 28 Sep Fly Play direct
04 Sep - 07 Sep Fly Play direct
30 Sep - 07 Oct easyJet
24 Sep - 28 Sep Ryanair
13 Sep - 20 Sep easyJet
18 Sep - 23 Sep Ryanair
04 Sep - 14 Sep Fly Play direct
23 Sep - 27 Sep easyJet
22 Sep - 30 Sep Ryanair
21 Sep - 28 Sep Ryanair
16 Sep - 28 Sep easyJet

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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