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

Return flights

13 Oct - 28 Oct	Scandinavian Airlines
11 Oct - 21 Oct	Scandinavian Airlines
11 Oct - 19 Oct	Scandinavian Airlines
08 Oct - 19 Oct	Scandinavian Airlines
08 Oct - 23 Oct	Scandinavian Airlines
17 Oct - 23 Oct	Scandinavian Airlines
15 Oct - 19 Oct	Scandinavian Airlines
15 Oct - 21 Oct	Scandinavian Airlines
17 Oct - 26 Oct	Scandinavian Airlines
10 Oct - 16 Oct	Scandinavian Airlines
18 Oct - 01 Nov	Finnair
31 Oct - 08 Nov	Finnair
30 Oct - 08 Nov	Finnair
23 Oct - 05 Nov	Finnair
24 Oct - 01 Nov	Finnair
29 Oct - 04 Nov	Emirates
31 Oct - 12 Nov	Qatar Airways

Also check the deals for one-way flights from Seoul 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 Seoul to Keflavik in October from $648

Return flights