Cheapest return flights from Porto to Keflavik in September from 178€

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
07 Sep - 14 Sep Fly Play direct
18 Sep - 02 Oct Fly Play direct
25 Sep - 30 Sep easyJet
10 Sep - 16 Sep Ryanair
28 Sep - 05 Oct Ryanair
09 Sep - 13 Sep Ryanair
29 Sep - 06 Oct easyJet
16 Sep - 25 Sep easyJet
20 Sep - 28 Sep Ryanair
29 Sep - 04 Oct easyJet
12 Sep - 21 Sep Ryanair
11 Sep - 18 Sep Fly Play direct
28 Sep - 05 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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