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

Return flights

21 Sep - 28 Sep	Wizz Air Malta
11 Sep - 18 Sep	Wizz Air Malta
09 Sep - 16 Sep	Wizz Air
25 Sep - 09 Oct	Wizz Air Malta
07 Sep - 14 Sep	Wizz Air Malta
17 Sep - 28 Sep	easyJet
17 Sep - 28 Sep	Iberia Express	direct
17 Sep - 29 Sep	Iberia Express
10 Sep - 17 Sep	Wizz Air
22 Sep - 29 Sep	Fly Play
28 Sep - 05 Oct	Wizz Air
07 Sep - 08 Sep	Lufthansa
19 Sep - 01 Oct	Fly Play
19 Sep - 01 Oct	Fly Play	direct
28 Sep - 05 Oct	Fly Play	direct

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

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 September from $267

Return flights