Cheapest return KEF–MAD flights, May

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

Return flights

24 May - 30 May Wizz Air
12 May - 19 May Wizz Air
23 May - 30 May Scandinavian Airlines
11 May - 18 May Wizz Air
29 May - 04 Jun Wizz Air
29 May - 05 Jun Wizz Air
10 May - 12 May Wizz Air Malta
09 May - 12 May Wizz Air Malta
29 May - 07 Jun Wizz Air
22 May - 30 May Wizz Air
30 May - 06 Jun Wizz Air
14 May - 17 May Wizz Air
22 May - 31 May Wizz Air

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

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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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