AirHint found the following cheapest one-way flights from Keflavik (KEF) to Dublin (DUB) in December 2025 (see full year).

One-Way flights

13 Dec	Transavia France
29 Dec	easyJet
08 Dec	easyJet
10 Dec	easyJet
07 Dec	easyJet
29 Dec	Icelandair	direct
07 Dec	Icelandair	direct
08 Dec	Icelandair	direct
13 Dec	Icelandair	direct
10 Dec	Icelandair	direct

Also check the deals for return flights from Keflavik to Dublin 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 one-way flights from Keflavik to Dublin in December from 84€

One-Way flights