AirHint found the following cheapest return flights from Madrid (MAD) to Keflavik (KEF) in May 2026 (see full year).
Return flights
| 01 May - 08 May | Fly Play | direct | |
| 01 May - 15 May | Fly Play | direct | |
| 12 May - 14 May | Iberia Express | ||
| 08 May - 13 May | Iberia | ||
| 02 May - 09 May | ITA Airways | ||
| 01 May - 03 May | Wizz Air Malta |
Also check the deals for one-way flights from Madrid to Keflavik in May.
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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