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

Return flights

03 Dec - 10 Dec	easyJet
06 Dec - 12 Dec	SWISS
01 Dec - 07 Dec	Wizz Air Malta
04 Dec - 11 Dec	Transavia France
05 Dec - 08 Dec	easyJet
06 Dec - 14 Dec	Transavia France
12 Dec - 14 Dec	Lufthansa
05 Dec - 12 Dec	easyJet
11 Dec - 14 Dec	easyJet
08 Dec - 15 Dec	Wizz Air
31 Dec - 07 Jan	easyJet
29 Dec - 07 Jan	easyJet
31 Dec - 02 Jan	easyJet
30 Dec - 02 Jan	easyJet
26 Dec - 03 Jan	easyJet
26 Dec - 02 Jan	Wizz Air
19 Dec - 02 Jan	Wizz Air Malta

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

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 December from $199

Return flights