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

Return flights

13 Apr - 17 Apr	Fly Play	direct
17 Apr - 24 Apr	Fly Play	direct
17 Apr - 27 Apr	Fly Play	direct
13 Apr - 20 Apr	Fly Play	direct
10 Apr - 17 Apr	Fly Play	direct
24 Apr - 27 Apr	Fly Play	direct
10 Apr - 20 Apr	Fly Play	direct
10 Apr - 13 Apr	Fly Play	direct
03 Apr - 10 Apr	Fly Play	direct
03 Apr - 13 Apr	Fly Play	direct
25 Apr - 06 May	Iberia Express
24 Apr - 03 May	Norwegian
27 Apr - 02 May	Iberia Express
26 Apr - 02 May	Iberia
22 Apr - 02 May	Iberia Express

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

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 return flights from Madrid to Keflavik in April from $210

Return flights