Cheapest one-way flights from Porto to Keflavik in September from 113€

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

One-Way flights

30 Sep easyJet
18 Sep Ryanair
29 Sep easyJet
14 Sep Ryanair
28 Sep Ryanair
07 Sep Ryanair
18 Sep Fly Play direct
28 Sep Fly Play direct
14 Sep Fly Play direct
07 Sep Fly Play direct

Also check the deals for return 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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