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

Return flights

07 Dec - 12 Dec	Vueling Airlines
05 Dec - 12 Dec	Vueling Airlines
13 Dec - 17 Dec	easyJet
01 Dec - 05 Dec	Vueling Airlines
13 Dec - 18 Dec	easyJet
11 Dec - 17 Dec	Vueling Airlines
10 Dec - 15 Dec	easyJet
15 Dec - 18 Dec	easyJet
11 Dec - 15 Dec	Vueling Airlines
01 Dec - 16 Dec	Vueling Airlines
31 Dec - 07 Jan	Vueling Airlines
23 Dec - 01 Jan	easyJet
18 Dec - 01 Jan	Vueling Airlines
23 Dec - 04 Jan	easyJet
31 Dec - 02 Jan	Vueling Airlines
22 Dec - 05 Jan	Vueling Airlines
28 Dec - 08 Jan	Fly Play	direct
30 Dec - 04 Jan	Vueling Airlines
18 Dec - 01 Jan	Fly Play	direct
19 Dec - 02 Jan	Vueling Airlines

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 138€

Return flights