AirHint found the following cheapest one-way flights from Keflavik (KEF) to Madrid (MAD) in August 2026 (see full year).

One-Way flights

20 Aug	Iberia Express	direct
13 Aug	Iberia Express	direct
06 Aug	Iberia Express	direct
02 Aug	easyJet
05 Aug	easyJet
04 Aug	Wizz Air Malta
23 Aug	Iberia Express	direct
16 Aug	Iberia Express	direct
02 Aug	Iberia Express	direct
30 Aug	Iberia Express	direct

Also check the deals for return flights from Keflavik to Madrid in August.

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 Keflavik to Madrid in August from 123€

One-Way flights