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

Return flights

24 Nov - 29 Nov	easyJet
29 Nov - 06 Dec	Vueling Airlines
25 Nov - 28 Nov	Vueling Airlines
12 Nov - 19 Nov	easyJet
26 Nov - 30 Nov	easyJet
23 Nov - 30 Nov	easyJet
25 Nov - 01 Dec	easyJet
12 Nov - 16 Nov	easyJet
24 Nov - 01 Dec	easyJet
03 Nov - 07 Nov	Ryanair
27 Nov - 01 Dec	Ryanair
01 Nov - 01 Nov	TAP

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

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 November from $245

Return flights