AirHint found the following cheapest one-way flights from Madrid (MAD) to Keflavik (KEF) in July 2025 (see full year).

One-Way flights

06 Jul	Vueling Airlines	direct
02 Jul	Iberia Express	direct
27 Jul	Iberia Express	direct
13 Jul	Iberia Express	direct
09 Jul	Iberia Express	direct
30 Jul	Iberia Express	direct
05 Jul	Iberia Express	direct
20 Jul	Iberia Express	direct
22 Jul	Wizz Air Malta
21 Jul	Ryanair

Also check the deals for return 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 one-way flights from Madrid to Keflavik in July from $94

One-Way flights