AirHint found the following cheapest return flights from Madrid (MAD) to Keflavik (KEF) in July 2026 (see full year).

Return flights

04 Jul - 19 Jul	Wizz Air UK
04 Jul - 15 Jul	Wizz Air UK
04 Jul - 13 Aug	Wizz Air UK
04 Jul - 23 Jul	Wizz Air UK
04 Jul - 12 Jul	Iberia
04 Jul - 07 Jul	Wizz Air UK
01 Jul - 12 Jul	SWISS
04 Jul - 16 Jul	Wizz Air UK
01 Jul - 08 Jul	easyJet
07 Jul - 21 Jul	Wizz Air UK
20 Jul - 27 Jul	SWISS
25 Jul - 01 Aug	Wizz Air UK
01 Jul - 27 Aug	easyJet
02 Jul - 28 Aug	Air Europa
28 Jul - 12 Aug	Wizz Air UK
25 Jul - 06 Aug	Wizz Air UK
25 Jul - 02 Aug	Wizz Air UK
02 Jul - 11 Aug	Air Europa
28 Jul - 06 Aug	Wizz Air UK
27 Jul - 02 Aug	SWISS

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

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 July from $308

Return flights