Cheapest return flights from Porto to Keflavik in September from $180

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

Return flights

11 Sep - 14 Sep Fly Play direct
18 Sep - 02 Oct Fly Play direct
18 Sep - 28 Sep Fly Play direct
25 Sep - 02 Oct Fly Play direct
28 Sep - 02 Oct Fly Play direct
11 Sep - 18 Sep Fly Play direct
11 Sep - 21 Sep Fly Play direct
04 Sep - 14 Sep Fly Play direct
18 Sep - 25 Sep Fly Play direct
25 Sep - 28 Sep Fly Play direct
25 Sep - 05 Oct Fly Play direct
28 Sep - 05 Oct Fly Play direct
14 Sep - 18 Sep Fly Play direct
14 Sep - 21 Sep Fly Play direct
14 Sep - 25 Sep Fly Play direct
24 Sep - 05 Oct easyJet
27 Sep - 05 Oct easyJet
26 Sep - 05 Oct Ryanair
25 Sep - 04 Oct Ryanair
26 Sep - 04 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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