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

Return flights

04 Mar - 10 Mar	easyJet
04 Mar - 13 Mar	easyJet
02 Mar - 09 Mar	easyJet
06 Mar - 09 Mar	easyJet
11 Mar - 18 Mar	easyJet
02 Mar - 13 Mar	easyJet
11 Mar - 23 Mar	Transavia France
09 Mar - 13 Mar	easyJet
05 Mar - 09 Mar	easyJet
02 Mar - 06 Mar	Fly Play	direct
25 Mar - 08 Apr	easyJet
27 Mar - 08 Apr	Iberia
27 Mar - 10 Apr	Iberia
24 Mar - 01 Apr	Iberia Express
30 Mar - 06 Apr	Fly Play	direct
31 Mar - 11 Apr	easyJet
27 Mar - 01 Apr	Iberia
26 Mar - 02 Apr	Ryanair
27 Mar - 04 Apr	Iberia
28 Mar - 04 Apr	Iberia

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

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 March from $186

Return flights