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

Return flights

16 Jan - 23 Jan	easyJet
18 Jan - 23 Jan	easyJet
12 Jan - 17 Jan	Wizz Air Malta
10 Jan - 17 Jan	Ryanair
09 Jan - 18 Jan	easyJet
19 Jan - 26 Jan	Transavia France
12 Jan - 18 Jan	easyJet
16 Jan - 21 Jan	easyJet
16 Jan - 25 Jan	easyJet
23 Jan - 30 Jan	easyJet
26 Jan - 02 Feb	Transavia France
31 Jan - 04 Feb	Ryanair
26 Jan - 02 Feb	Fly Play	direct
28 Jan - 02 Feb	Wizz Air Malta
30 Jan - 06 Feb	Fly Play	direct
30 Jan - 02 Feb	Fly Play	direct
20 Jan - 01 Feb	Ryanair
26 Jan - 01 Feb	Ryanair
31 Jan - 03 Feb	Ryanair
27 Jan - 02 Feb	Iberia Express

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 144€

Return flights