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

Return flights

25 Jan - 28 Jan	easyJet
25 Jan - 06 Feb	easyJet
30 Jan - 06 Feb	easyJet
25 Jan - 29 Jan	easyJet
30 Jan - 04 Feb	easyJet
11 Jan - 21 Jan	easyJet
18 Jan - 22 Jan	easyJet
18 Jan - 21 Jan	easyJet
29 Jan - 04 Feb	Air Europa
30 Jan - 05 Feb	easyJet
18 Jan - 25 Jan	easyJet
09 Jan - 14 Jan	easyJet
12 Jan - 16 Jan	Wizz Air Malta
26 Jan - 29 Jan	easyJet
22 Jan - 28 Jan	easyJet
29 Jan - 05 Feb	Air Europa
30 Jan - 01 Feb	easyJet
25 Jan - 02 Feb	easyJet
30 Jan - 02 Feb	easyJet
26 Jan - 05 Feb	easyJet

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 123€

Return flights