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

Return flights

10 Mar - 17 Mar	easyJet
09 Mar - 17 Mar	easyJet
07 Mar - 17 Mar	easyJet
11 Mar - 17 Mar	easyJet
12 Mar - 17 Mar	easyJet
15 Mar - 18 Mar	easyJet
14 Mar - 17 Mar	easyJet
13 Mar - 17 Mar	easyJet
10 Mar - 14 Mar	easyJet
21 Mar - 25 Mar	easyJet
30 Mar - 11 Apr	Wizz Air
22 Mar - 02 Apr	Ryanair
24 Mar - 02 Apr	easyJet
30 Mar - 05 Apr	Wizz Air
25 Mar - 04 Apr	easyJet
26 Mar - 05 Apr	Air Europa
26 Mar - 09 Apr	Air Europa
23 Mar - 01 Apr	Ryanair
28 Mar - 12 Apr	Air Europa
26 Mar - 01 Apr	Air Europa

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 $123

Return flights