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

Return flights

20 Apr - 27 Apr	Fly Play	direct
27 Apr - 04 May	Fly Play	direct
13 Apr - 24 Apr	Fly Play	direct
10 Apr - 17 Apr	Fly Play	direct
17 Apr - 20 Apr	Fly Play	direct
17 Apr - 26 Apr	Wizz Air Malta
06 Apr - 17 Apr	Fly Play	direct
08 Apr - 15 Apr	Iberia
11 Apr - 19 Apr	Iberia
13 Apr - 19 Apr	Iberia
09 Apr - 18 Apr	Iberia
30 Apr - 03 May	Wizz Air UK
30 Apr - 10 May	Wizz Air UK
25 Apr - 02 May	Air Europa
25 Apr - 04 May	Air Europa

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 179€

Return flights