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

Return flights

13 Jan - 21 Jan	Ryanair
27 Jan - 02 Feb	Ryanair
28 Jan - 01 Feb	KLM
20 Jan - 23 Jan	Iberia Express
20 Jan - 25 Jan	Iberia Express
24 Jan - 28 Jan	Ryanair
31 Jan - 02 Feb	Ryanair
10 Jan - 17 Jan	Scandinavian Airlines
17 Jan - 21 Jan	Ryanair
24 Jan - 29 Jan	Ryanair
31 Jan - 08 Feb	Ryanair
26 Jan - 29 Jan	easyJet
19 Jan - 21 Jan	Ryanair
20 Jan - 27 Jan	Ryanair
23 Jan - 05 Feb	Ryanair
22 Jan - 04 Feb	Wizz Air
23 Jan - 02 Feb	Ryanair
22 Jan - 28 Feb	Wizz Air
25 Jan - 01 Feb	KLM
30 Jan - 06 Feb	Ryanair

Also check the deals for one-way flights from Madrid 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 Madrid to Keflavik in January from $225

Return flights