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

Return flights

04 Mar - 11 Mar	easyJet
06 Mar - 09 Mar	easyJet
02 Mar - 12 Mar	easyJet
05 Mar - 09 Mar	easyJet
09 Mar - 18 Mar	easyJet
23 Mar - 27 Mar	Fly Play	direct
23 Mar - 30 Mar	Fly Play	direct
23 Mar - 29 Mar	Iberia Express
16 Mar - 23 Mar	Ryanair
16 Mar - 30 Mar	Fly Play	direct
23 Mar - 12 Apr	Iberia Express
30 Mar - 10 Apr	Fly Play	direct
28 Mar - 07 Apr	Transavia France
30 Mar - 06 Apr	Fly Play	direct
25 Mar - 08 Apr	easyJet
28 Mar - 02 Apr	Transavia France
27 Mar - 06 Apr	Fly Play	direct
27 Mar - 05 Apr	Ryanair
28 Mar - 06 Apr	Transavia France
28 Mar - 05 Apr	Transavia France

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 166€

Return flights