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
23 Jan - 27 Jan	Aer Lingus
07 Jan - 12 Jan	Ryanair
13 Jan - 15 Jan	Aer Lingus
10 Jan - 24 Jan	Ryanair
07 Jan - 10 Jan	Ryanair
10 Jan - 12 Jan	Ryanair
24 Jan - 28 Jan	Aer Lingus
23 Jan - 26 Jan	Aer Lingus
20 Jan - 23 Jan	Aer Lingus
28 Jan - 03 Feb	Ryanair
30 Jan - 04 Feb	Ryanair
31 Jan - 03 Feb	Ryanair
30 Jan - 02 Feb	Transavia France
31 Jan - 01 Feb	Ryanair
30 Jan - 01 Feb	Ryanair
27 Jan - 03 Feb	Icelandair	direct
28 Jan - 03 Feb	Icelandair	direct
31 Jan - 03 Feb	Icelandair	direct
30 Jan - 03 Feb	Ryanair

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 139€

Return flights