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

Return flights

02 May - 07 May	Scandinavian Airlines
11 May - 20 May	Scandinavian Airlines
01 May - 08 May	Scandinavian Airlines
16 May - 26 May	Scandinavian Airlines
23 May - 02 Jun	Scandinavian Airlines
23 May - 01 Jun	Scandinavian Airlines
29 May - 05 Jun	Scandinavian Airlines
18 May - 25 May	Lufthansa
30 May - 06 Jun	Finnair
27 May - 29 May	Qatar Airways
12 May - 20 May	Asiana Airlines

Also check the deals for one-way flights from Seoul to Keflavik in May.

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 May from $690

Return flights