Cheapest return flights from Madrid to Keflavik in December from $178

Best time to book flights for Madrid (MAD) to Keflavik (KEF) flights at AirHint

AirHint found the following cheapest return flights from Madrid (MAD) to Keflavik (KEF) in December 2025 (see full year).

Return flights

12 Dec - 15 Dec Fly Play direct
01 Dec - 05 Dec Fly Play direct
15 Dec - 22 Dec Fly Play direct
08 Dec - 12 Dec Fly Play direct
02 Dec - 06 Dec Iberia Express
05 Dec - 10 Dec easyJet
02 Dec - 05 Dec Iberia Express
05 Dec - 09 Dec easyJet
05 Dec - 12 Dec easyJet
06 Dec - 12 Dec Ryanair
22 Dec - 02 Jan Fly Play direct
27 Dec - 05 Jan Iberia Express

Also check the deals for one-way flights from Madrid to Keflavik in December.

Skyscanner

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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