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

Return flights

21 Jun - 01 Jul	Fly Play	direct
21 Jun - 28 Jun	Fly Play	direct
28 Jun - 05 Jul	Fly Play	direct
24 Jun - 01 Jul	Fly Play	direct
17 Jun - 24 Jun	easyJet
24 Jun - 07 Jul	Ryanair
17 Jun - 24 Jun	Fly Play	direct
23 Jun - 29 Jun	Ryanair
17 Jun - 23 Jun	easyJet
23 Jun - 01 Jul	Transavia France
18 Jun - 23 Jun	Ryanair
17 Jun - 21 Jun	Fly Play	direct
14 Jun - 16 Jun	easyJet
20 Jun - 24 Jun	Lufthansa
27 Jun - 30 Jun	SWISS
27 Jun - 03 Jul	TAP
28 Jun - 06 Jul	SWISS
24 Jun - 04 Jul	Ryanair

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

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 June from $298

Return flights