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

Return flights

24 Oct - 31 Oct	Scandinavian Airlines
24 Oct - 27 Oct	Scandinavian Airlines
17 Oct - 22 Oct	airBaltic
01 Oct - 08 Oct	Scandinavian Airlines
23 Oct - 28 Oct	Scandinavian Airlines
03 Oct - 06 Oct	airBaltic
27 Oct - 30 Oct	Scandinavian Airlines
29 Oct - 01 Nov	Scandinavian Airlines
18 Oct - 22 Oct	airBaltic
02 Oct - 12 Oct	Scandinavian Airlines
06 Oct - 10 Oct	Scandinavian Airlines
29 Oct - 01 Nov	Icelandair	direct

Also check the deals for one-way flights from Helsinki to Keflavik in October.

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 October from 221€

Return flights