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

Return flights

20 Aug - 31 Aug	easyJet
25 Aug - 31 Aug	Eurowings
30 Aug - 10 Sep	easyJet
25 Aug - 31 Aug	Iberia Express	direct
03 Aug - 10 Aug	Wizz Air
16 Aug - 23 Aug	Lufthansa
20 Aug - 31 Aug	Iberia	direct
04 Aug - 10 Aug	Fly Play
04 Aug - 10 Aug	Iberia	direct
03 Aug - 10 Aug	Iberia Express	direct
01 Aug - 10 Aug	Fly Play	direct

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

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 Reykjavik to Madrid in August from 239€

Return flights