Cheapest return flights from Madrid to Keflavik in September from 209€

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

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

Return flights

07 Sep - 12 Sep Fly Play direct
10 Sep - 23 Sep Ryanair
24 Sep - 01 Oct Ryanair
10 Sep - 16 Sep Ryanair
17 Sep - 24 Sep Ryanair
17 Sep - 26 Sep Fly Play direct
24 Sep - 01 Oct Fly Play direct
26 Sep - 01 Oct Fly Play direct
03 Sep - 12 Sep Fly Play direct
10 Sep - 17 Sep Ryanair
28 Sep - 08 Oct Wizz Air Malta
27 Sep - 11 Oct Iberia Express
23 Sep - 30 Sep British Airways
28 Sep - 01 Oct Wizz Air Malta
16 Sep - 01 Oct Iberia Express
12 Sep - 26 Sep Fly Play direct
10 Sep - 17 Sep Fly Play direct
28 Sep - 01 Oct Fly Play direct
24 Sep - 03 Oct Fly Play direct
26 Sep - 03 Oct Fly Play direct

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