Cheapest one-way flights from Keflavik to Madrid in September from $106

Best time to book flights for Keflavik (KEF) to Madrid (MAD) flights at AirHint

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

One-Way flights

17 Sep easyJet
21 Sep easyJet
27 Sep easyJet
20 Sep easyJet
28 Sep easyJet
08 Sep Iberia Express direct
18 Sep Iberia Express direct
15 Sep Iberia Express direct
28 Sep Iberia Express direct
25 Sep Iberia Express direct

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

Skyscanner

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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