AirHint found the following cheapest return flights from Seoul (ICN) to Keflavik (KEF) in December 2026 (see full year).

Return flights

04 Dec - 14 Dec	Scandinavian Airlines
19 Dec - 27 Dec	LOT
02 Dec - 16 Dec	Scandinavian Airlines
23 Dec - 03 Jan	LOT
23 Dec - 27 Dec	LOT
09 Dec - 16 Dec	Finnair
11 Dec - 19 Dec	Finnair
11 Dec - 20 Dec	Finnair
07 Dec - 18 Dec	Finnair
10 Dec - 20 Dec	Finnair
10 Dec - 21 Dec	Finnair
26 Dec - 01 Jan	Finnair
24 Dec - 02 Jan	Finnair
29 Dec - 08 Jan	Finnair
24 Dec - 01 Jan	Finnair
31 Dec - 09 Jan	Finnair
25 Dec - 01 Jan	Emirates

Also check the deals for one-way flights from Seoul 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 Seoul to Keflavik in December from 617€

Return flights