Cheapest return flights from Porto to Keflavik in September from 237€

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

Return flights

11 Sep - 18 Sep KLM
11 Sep - 21 Sep Fly Play direct
28 Sep - 02 Oct Fly Play direct
18 Sep - 02 Oct Fly Play direct
25 Sep - 02 Oct Fly Play direct
19 Sep - 23 Sep Ryanair
18 Sep - 25 Sep Fly Play direct
18 Sep - 21 Sep Fly Play direct
29 Sep - 05 Oct Ryanair
12 Sep - 18 Sep Ryanair
04 Sep - 07 Sep KLM
23 Sep - 30 Sep Ryanair
17 Sep - 20 Sep Ryanair
10 Sep - 20 Sep Ryanair
21 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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