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

Return flights

09 Jan - 14 Jan	easyJet
23 Jan - 28 Jan	easyJet
23 Jan - 26 Jan	easyJet
30 Jan - 02 Feb	easyJet
18 Jan - 23 Jan	easyJet
14 Jan - 23 Jan	easyJet
12 Jan - 15 Jan	Transavia France
22 Jan - 26 Jan	Ryanair
31 Jan - 05 Feb	TAP
22 Jan - 25 Jan	Ryanair
01 Jan - 08 Jan	Ryanair

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

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 January from 167€

Return flights