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

Return flights

14 Apr - 18 Apr	Wizz Air Malta
22 Apr - 29 Apr	easyJet
14 Apr - 27 Apr	Wizz Air Malta
13 Apr - 20 Apr	Wizz Air Malta
11 Apr - 18 Apr	Wizz Air Malta
15 Apr - 22 Apr	easyJet
22 Apr - 28 Apr	easyJet
25 Apr - 06 May	Wizz Air UK
18 Apr - 27 Apr	Wizz Air UK
20 Apr - 26 Apr	Wizz Air Malta
15 Apr - 20 Apr	easyJet
25 Apr - 03 May	Wizz Air UK
29 Apr - 06 May	easyJet
28 Apr - 03 May	Wizz Air UK
24 Apr - 03 May	Iberia
25 Apr - 02 May	Wizz Air UK
24 Apr - 02 May	Iberia
23 Apr - 01 May	Wizz Air Malta

Also check the deals for one-way flights from Madrid to Keflavik in April.

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 April from $187

Return flights