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

Return flights

26 Jan - 31 Jan	Ryanair
30 Jan - 02 Feb	Ryanair
30 Jan - 05 Feb	Ryanair
27 Jan - 01 Feb	Ryanair
20 Jan - 23 Jan	Ryanair
18 Jan - 24 Jan	Wizz Air
10 Jan - 13 Jan	Ryanair
16 Jan - 25 Jan	Ryanair
27 Jan - 30 Jan	Ryanair
17 Jan - 24 Jan	Ryanair
31 Jan - 07 Feb	Ryanair
16 Jan - 20 Jan	Ryanair
24 Jan - 29 Jan	Ryanair
25 Jan - 29 Jan	Wizz Air
30 Jan - 01 Feb	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 181€

Return flights