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
10 Apr - 17 Apr	Fly Play	direct
17 Apr - 20 Apr	Fly Play	direct
10 Apr - 20 Apr	Fly Play	direct
03 Apr - 10 Apr	Fly Play	direct
04 Apr - 12 Apr	Iberia Express
15 Apr - 27 Apr	Iberia Express
13 Apr - 25 Apr	Iberia Express
03 Apr - 13 Apr	Fly Play	direct
28 Apr - 07 May	Iberia Express
27 Apr - 03 May	Iberia
29 Apr - 03 May	ITA Airways
29 Apr - 08 May	Iberia Express
30 Apr - 03 May	TAP

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