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

Return flights

21 Jan - 28 Jan	Aer Lingus
21 Jan - 26 Jan	Aer Lingus
12 Jan - 15 Jan	Ryanair
21 Jan - 24 Jan	Aer Lingus
10 Jan - 15 Jan	Ryanair
20 Jan - 30 Jan	Aer Lingus
17 Jan - 23 Jan	Ryanair
17 Jan - 19 Jan	Ryanair
07 Jan - 10 Jan	Vueling Airlines
21 Jan - 25 Jan	Aer Lingus
28 Jan - 01 Feb	Ryanair
26 Jan - 01 Feb	Ryanair
27 Jan - 01 Feb	Aer Lingus
29 Jan - 07 Feb	Ryanair
31 Jan - 07 Feb	Aer Lingus
24 Jan - 01 Feb	Aer Lingus
30 Jan - 07 Feb	Ryanair
22 Jan - 01 Feb	Ryanair
23 Jan - 01 Feb	Ryanair
29 Jan - 02 Feb	Scandinavian Airlines

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 $157

Return flights