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

Return flights

06 Dec - 12 Dec	SWISS
10 Dec - 14 Jan	easyJet
03 Dec - 08 Dec	easyJet
02 Dec - 06 Dec	easyJet
06 Dec - 13 Dec	Wizz Air
04 Dec - 07 Dec	easyJet
31 Dec - 07 Jan	KLM
30 Dec - 08 Jan	easyJet
09 Dec - 04 Jan	easyJet
11 Dec - 15 Dec	KLM
29 Dec - 05 Jan	easyJet
18 Dec - 04 Jan	easyJet
16 Dec - 20 Dec	easyJet
18 Dec - 30 Dec	easyJet
16 Dec - 30 Dec	easyJet
15 Dec - 19 Dec	easyJet
18 Dec - 03 Jan	easyJet
29 Dec - 07 Jan	easyJet
29 Dec - 02 Jan	easyJet
19 Dec - 03 Jan	transavia

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 167€

Return flights