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

Return flights

09 Dec - 16 Dec	Wizz Air
02 Dec - 04 Dec	easyJet
24 Dec - 01 Jan	Wizz Air
06 Dec - 29 Dec	Wizz Air
23 Dec - 02 Jan	Scandinavian Airlines
01 Dec - 01 Dec	Wizz Air
03 Dec - 04 Dec	Scandinavian Airlines
14 Dec - 14 Dec	Scandinavian Airlines
20 Dec - 26 Dec	Scandinavian Airlines
10 Dec - 17 Dec	Icelandair	direct
21 Dec - 26 Dec	Scandinavian Airlines
19 Dec - 27 Dec	Scandinavian Airlines
23 Dec - 03 Jan	Scandinavian Airlines
23 Dec - 02 Jan	Icelandair	direct
23 Dec - 03 Jan	Icelandair	direct

Also check the deals for one-way flights from Keflavik to Stockholm 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 Keflavik to Stockholm in December from $224

Return flights