Cheapest return flights from Madrid to Keflavik in May from $173

Best time to book flights for Madrid (MAD) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Madrid (MAD) to Keflavik (KEF) in May 2025 (see full year).

Return flights

17 May - 29 May Iberia Express direct
17 May - 22 May Iberia Express direct
24 May - 29 May Iberia Express direct
21 May - 30 May Fly Play direct
14 May - 22 May Iberia Express direct
21 May - 23 May Fly Play direct
23 May - 30 May Fly Play direct
21 May - 01 Jun Fly Play direct
03 May - 08 May Iberia Express direct
05 May - 09 May Fly Play direct
03 May - 11 May Iberia Express direct
28 May - 04 Jun Fly Play direct
28 May - 01 Jun Fly Play direct
28 May - 03 Jun Iberia Express
28 May - 05 Jun Iberia Express direct
21 May - 11 Jun Fly Play direct
16 May - 01 Jun Fly Play direct
30 May - 01 Jun Fly Play direct
24 May - 01 Jun Iberia Express
24 May - 10 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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