AirHint found the following cheapest return flights from Stockholm (ARN) to Keflavik (KEF) in December 2025 (see full year).

Return flights

31 Dec - 01 Jan	Scandinavian Airlines
29 Dec - 02 Jan	Wizz Air
28 Dec - 04 Jan	Wizz Air
30 Dec - 01 Jan	Norwegian Air Sweden AOC
30 Dec - 02 Jan	Scandinavian Airlines
31 Dec - 01 Jan	Icelandair	direct
30 Dec - 01 Jan	Icelandair	direct
29 Dec - 02 Jan	Icelandair	direct
30 Dec - 02 Jan	Icelandair	direct
30 Dec - 06 Jan	Icelandair	direct

Also check the deals for one-way flights from Stockholm to Keflavik in December.

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 Stockholm to Keflavik in December from 283€

Return flights