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

Return flights

09 Dec - 16 Dec	easyJet
08 Dec - 13 Dec	easyJet
11 Dec - 14 Dec	easyJet
13 Dec - 14 Dec	easyJet
18 Dec - 31 Dec	easyJet
27 Dec - 03 Jan	easyJet
12 Dec - 14 Dec	easyJet
15 Dec - 20 Dec	easyJet
09 Dec - 16 Dec	Icelandair	direct
22 Dec - 02 Jan	Transavia France
11 Dec - 14 Dec	Icelandair	direct
18 Dec - 26 Dec	easyJet

Also check the deals for one-way 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.

Book a cheap hotel in Dublin

Cheap car rent in Dublin

Cheapest return flights from Keflavik to Dublin in December from 193€

Return flights