Cheapest return flights from Madrid to Keflavik in September from $228

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

Return flights

22 Sep - 30 Sep Wizz Air UK
11 Sep - 15 Sep Wizz Air Malta
14 Sep - 23 Sep Wizz Air Malta
28 Sep - 06 Oct Wizz Air Malta
11 Sep - 22 Sep Wizz Air Malta
11 Sep - 19 Sep Wizz Air Malta
05 Sep - 12 Sep Norwegian
15 Sep - 19 Sep Ryanair
07 Sep - 16 Sep Wizz Air Malta
09 Sep - 17 Sep Wizz Air Malta
15 Sep - 22 Sep Ryanair
29 Sep - 04 Oct LOT

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

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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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