Cheapest return flights from Madrid to Keflavik in August from $242

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

Return flights

31 Aug - 10 Sep Vueling Airlines
31 Aug - 11 Sep Vueling Airlines
31 Aug - 09 Sep Vueling Airlines
31 Aug - 08 Sep Vueling Airlines
31 Aug - 14 Sep Vueling Airlines
27 Aug - 07 Sep Vueling Airlines
30 Aug - 13 Sep Vueling Airlines
27 Aug - 03 Sep Vueling Airlines
30 Aug - 14 Sep Vueling Airlines
31 Aug - 07 Sep Vueling Airlines
23 Aug - 27 Aug Vueling Airlines
23 Aug - 24 Aug Vueling Airlines
23 Aug - 28 Aug Vueling Airlines
27 Aug - 31 Aug Iberia Express direct
23 Aug - 25 Aug Iberia Express direct
23 Aug - 24 Aug Iberia Express direct
23 Aug - 31 Aug Vueling Airlines
24 Aug - 28 Aug Fly Play
26 Aug - 28 Aug Iberia Express
26 Aug - 31 Aug Iberia Express

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

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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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