AirHint found the following cheapest return flights from Keflavik (KEF) to Madrid (MAD) in May 2026 (see full year).
Return flights
| 28 May - 31 May | Wizz Air Malta | ||
| 25 May - 01 Jun | easyJet | ||
| 29 May - 31 May | Transavia France | ||
| 30 May - 01 Jun | easyJet | ||
| 22 May - 25 May | easyJet |
Also check the deals for one-way flights from Keflavik to Madrid in May.
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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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