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

Return flights

29 Jul - 02 Aug	Fly Play	direct
15 Jul - 26 Jul	Fly Play	direct
26 Jul - 09 Aug	Fly Play	direct
19 Jul - 26 Jul	Fly Play	direct
22 Jul - 26 Jul	Fly Play	direct
15 Jul - 22 Jul	Fly Play	direct
29 Jul - 12 Aug	Fly Play	direct
22 Jul - 29 Jul	easyJet
17 Jul - 20 Jul	easyJet
27 Jul - 31 Jul	Transavia France
22 Jul - 29 Jul	Fly Play	direct
19 Jul - 29 Jul	Fly Play	direct
19 Jul - 25 Jul	easyJet
28 Jul - 02 Aug	Ryanair
31 Jul - 08 Aug	Transavia France
31 Jul - 03 Aug	Lufthansa
27 Jul - 03 Aug	Vueling Airlines

Also check the deals for one-way flights from Porto to Keflavik in July.

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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Cheapest return flights from Porto to Keflavik in July from 338€

Return flights