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

Return flights

04 Jul - 21 Jul	Wizz Air UK
04 Jul - 22 Jul	Wizz Air UK
01 Jul - 31 Jul	Transavia France
04 Jul - 15 Jul	Wizz Air UK
04 Jul - 08 Jul	Wizz Air UK
01 Jul - 12 Jul	SWISS
01 Jul - 05 Jul	Transavia France
01 Jul - 08 Jul	Transavia France
04 Jul - 14 Jul	Wizz Air UK
04 Jul - 13 Aug	Wizz Air UK
01 Jul - 06 Jul	SWISS
01 Jul - 16 Aug	Ryanair
07 Jul - 16 Aug	Wizz Air UK
18 Jul - 01 Aug	Ryanair
27 Jul - 03 Aug	Ryanair
25 Jul - 11 Aug	Wizz Air UK
29 Jul - 11 Aug	Iberia
06 Jul - 02 Aug	Wizz Air UK
28 Jul - 16 Aug	Ryanair
02 Jul - 16 Aug	Transavia France

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 255€

Return flights