AirHint found the following cheapest return flights from Porto (OPO) to Keflavik (KEF) in April 2026 (see full year).

Return flights

14 Apr - 17 Apr	Ryanair
13 Apr - 20 Apr	Ryanair
18 Apr - 26 Apr	easyJet
27 Apr - 02 May	easyJet
25 Apr - 03 May	easyJet
25 Apr - 02 May	Ryanair
24 Apr - 02 May	Ryanair
09 Apr - 16 Apr	KLM
01 Apr - 07 Apr	Ryanair
25 Apr - 01 May	Ryanair
26 Apr - 02 May	TAP
24 Apr - 26 Apr	easyJet
24 Apr - 01 May	Scandinavian Airlines
30 Apr - 10 May	KLM
01 Apr - 09 Apr	SWISS
04 Apr - 12 Apr	Ryanair
02 Apr - 07 Apr	Transavia France
01 Apr - 10 Apr	Wizz Air

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

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 April from $225

Return flights