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

Return flights

12 Jan - 15 Jan	Aer Lingus
20 Jan - 23 Jan	Aer Lingus
28 Jan - 04 Feb	Ryanair
06 Jan - 14 Jan	Aer Lingus
21 Jan - 23 Jan	Ryanair
24 Jan - 28 Jan	Aer Lingus
27 Jan - 31 Jan	Aer Lingus
16 Jan - 20 Jan	Aer Lingus
26 Jan - 29 Jan	Aer Lingus
13 Jan - 15 Jan	Aer Lingus
05 Jan - 02 Feb	Aer Lingus
29 Jan - 04 Feb	Ryanair
29 Jan - 31 Jan	Ryanair
31 Jan - 07 Feb	Ryanair
31 Jan - 04 Feb	Ryanair
30 Jan - 05 Feb	Scandinavian Airlines
29 Jan - 02 Feb	Ryanair
31 Jan - 08 Feb	Ryanair
30 Jan - 03 Feb	Ryanair
31 Jan - 06 Feb	Icelandair	direct

Also check the deals for one-way flights from Dublin to Keflavik in January.

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 January from 127€

Return flights