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

Return flights

12 Jan - 23 Jan	easyJet
16 Jan - 23 Jan	easyJet
15 Jan - 23 Jan	easyJet
09 Jan - 18 Jan	easyJet
12 Jan - 18 Jan	easyJet
15 Jan - 18 Jan	easyJet
16 Jan - 18 Jan	easyJet
23 Jan - 25 Jan	easyJet
23 Jan - 29 Jan	easyJet
16 Jan - 22 Jan	easyJet
30 Jan - 06 Feb	easyJet
28 Jan - 04 Feb	easyJet
30 Jan - 06 Feb	Fly Play	direct
26 Jan - 06 Feb	easyJet
26 Jan - 01 Feb	easyJet
30 Jan - 03 Feb	easyJet
31 Jan - 07 Feb	Ryanair
31 Jan - 02 Feb	Ryanair
26 Jan - 06 Feb	Fly Play	direct
27 Jan - 01 Feb	Air Europa

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 130€

Return flights