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

Return flights

23 Dec - 27 Dec	Icelandair	direct
03 Dec - 08 Dec	Icelandair	direct
01 Dec - 05 Dec	Icelandair	direct
04 Dec - 06 Dec	Icelandair	direct
23 Dec - 31 Dec	Icelandair	direct
27 Dec - 30 Dec	Icelandair	direct
26 Dec - 29 Dec	Icelandair	direct
02 Dec - 13 Dec	Scandinavian Airlines

Also check the deals for one-way flights from Dublin 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 Dublin to Keflavik in December from 218€

Return flights