Cheapest return flights from Porto to Keflavik in September from 145€

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

09 Sep - 17 Sep easyJet
20 Sep - 24 Sep easyJet
25 Sep - 28 Sep Fly Play direct
18 Sep - 21 Sep Fly Play direct
11 Sep - 14 Sep Fly Play direct
25 Sep - 02 Oct Fly Play direct
04 Sep - 14 Sep Fly Play direct
18 Sep - 24 Sep easyJet
20 Sep - 19 Oct easyJet
13 Sep - 24 Sep easyJet
24 Sep - 28 Sep Ryanair
27 Sep - 30 Sep easyJet
29 Sep - 05 Oct 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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