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

One-Way flights

02 Dec	airBaltic
13 Dec	airBaltic
22 Dec	airBaltic
17 Dec	Scandinavian Airlines
03 Dec	Scandinavian Airlines
02 Dec	Finnair	direct
17 Dec	Finnair	direct
03 Dec	Finnair	direct
31 Dec	Finnair	direct
22 Dec	Finnair	direct

Also check the deals for return 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 one-way flights from Helsinki to Keflavik in December from 103€

One-Way flights