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

Return flights

07 Dec - 11 Dec	Scandinavian Airlines
15 Dec - 17 Dec	airBaltic
13 Dec - 16 Dec	airBaltic
07 Dec - 12 Dec	Ryanair
06 Dec - 11 Dec	Ryanair
22 Dec - 27 Dec	Finnair	direct
15 Dec - 17 Dec	Finnair	direct
10 Dec - 13 Dec	Ryanair
31 Dec - 07 Jan	Finnair	direct
31 Dec - 01 Jan	Ryanair
22 Dec - 29 Dec	Finnair	direct
16 Dec - 23 Dec	airBaltic
31 Dec - 06 Jan	Finnair
31 Dec - 01 Jan	Finnair	direct
31 Dec - 05 Jan	Finnair	direct
29 Dec - 01 Jan	Finnair
29 Dec - 01 Jan	Finnair	direct
29 Dec - 03 Jan	Finnair	direct
26 Dec - 01 Jan	Finnair
30 Dec - 05 Jan	Finnair	direct

Also check the deals for one-way flights from Helsinki 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 Helsinki to Keflavik in December from $299

Return flights