Cheapest return flights from Porto to Keflavik in September from 182€

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 - 07 Sep Fly Play direct
04 Sep - 14 Sep Fly Play direct
25 Sep - 28 Sep Fly Play direct
16 Sep - 24 Sep easyJet
23 Sep - 30 Sep easyJet
16 Sep - 21 Sep easyJet
18 Sep - 21 Sep Fly Play direct
21 Sep - 28 Sep Fly Play direct
04 Sep - 20 Sep Fly Play
10 Sep - 18 Sep Ryanair

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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