AirHint found the following cheapest return flights from Keflavik (KEF) to Madrid (MAD) in March 2026 (see full year).
Return flights
| 01 Mar - 08 Mar | easyJet | ||
| 01 Mar - 20 Mar | easyJet | ||
| 27 Mar - 31 Mar | easyJet |
Also check the deals for one-way flights from Keflavik to Madrid in March.
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