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

Return flights

08 Oct - 16 Oct	Wizz Air Malta
21 Oct - 28 Oct	easyJet
09 Oct - 16 Oct	Wizz Air Malta
12 Oct - 16 Oct	Wizz Air Malta
22 Oct - 27 Oct	Iberia Express
08 Oct - 19 Oct	Wizz Air Malta
25 Oct - 27 Oct	Iberia Express
15 Oct - 26 Oct	easyJet
15 Oct - 04 Nov	easyJet
12 Oct - 19 Oct	Wizz Air Malta
25 Oct - 03 Nov	Iberia Express
22 Oct - 26 Oct	Iberia Express
27 Oct - 07 Nov	easyJet
27 Oct - 21 Nov	Wizz Air Malta
25 Oct - 01 Nov	Iberia Express
31 Oct - 07 Nov	Wizz Air Malta
21 Oct - 01 Nov	easyJet
27 Oct - 03 Nov	Wizz Air Malta
31 Oct - 03 Nov	easyJet
27 Oct - 01 Nov	Wizz Air Malta

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

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 Madrid to Keflavik in October from 133€

Return flights