Cheapest return flights from Madrid to Keflavik in May from 150€

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

Return flights

06 May - 14 May Iberia Express direct
16 May - 24 May Iberia Express direct
23 May - 31 May Iberia Express direct
20 May - 29 May Fly Play direct
22 May - 29 May Fly Play direct
02 May - 07 May Iberia Express direct
20 May - 31 May Iberia Express direct
20 May - 25 May Fly Play direct
04 May - 15 May Fly Play direct
01 May - 15 May Fly Play direct
22 May - 01 Jun Fly Play direct
29 May - 15 Jun Fly Play direct
27 May - 13 Jun Iberia Express

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