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

Return flights

02 Mar - 05 Mar	easyJet
13 Mar - 18 Mar	easyJet
06 Mar - 11 Mar	easyJet
04 Mar - 11 Mar	easyJet
03 Mar - 09 Mar	easyJet
04 Mar - 09 Mar	easyJet
08 Mar - 18 Mar	easyJet
10 Mar - 16 Mar	easyJet
11 Mar - 18 Mar	easyJet
02 Mar - 11 Mar	easyJet
23 Mar - 01 Apr	easyJet
25 Mar - 06 Apr	easyJet
26 Mar - 01 Apr	LOT
27 Mar - 08 Apr	easyJet
25 Mar - 04 Apr	easyJet
27 Mar - 01 Apr	easyJet
26 Mar - 07 Apr	Ryanair
21 Mar - 04 Apr	Iberia Express
26 Mar - 06 Apr	Iberia
29 Mar - 07 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 136€

Return flights