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

One-Way flights

29 Aug	Scandinavian Airlines
14 Aug	Scandinavian Airlines
06 Aug	Norwegian Air Sweden AOC
11 Aug	Norwegian Air Sweden AOC
30 Aug	airBaltic
13 Aug	Norwegian Air Sweden AOC
16 Aug	Scandinavian Airlines
29 Aug	Finnair	direct
31 Aug	airBaltic
26 Aug	Finnair	direct

Also check the deals for return flights from Helsinki to Keflavik in August.

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 August from 117€

One-Way flights