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

Return flights

08 Dec - 09 Dec	easyJet
13 Dec - 18 Dec	easyJet
03 Dec - 09 Dec	easyJet
08 Dec - 13 Dec	easyJet
10 Dec - 18 Dec	easyJet
16 Dec - 18 Dec	easyJet
09 Dec - 12 Dec	easyJet
08 Dec - 10 Dec	easyJet
15 Dec - 18 Dec	easyJet
11 Dec - 18 Dec	easyJet
31 Dec - 07 Jan	easyJet
22 Dec - 07 Jan	easyJet
16 Dec - 01 Jan	easyJet
30 Dec - 08 Jan	Vueling Airlines
31 Dec - 04 Jan	Wizz Air
31 Dec - 06 Jan	Wizz Air
30 Dec - 10 Jan	Wizz Air Malta
18 Dec - 04 Jan	Wizz Air Malta
30 Dec - 07 Jan	Vueling Airlines
31 Dec - 05 Jan	easyJet

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

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 Barcelona to Keflavik in December from $153

Return flights