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

Return flights

04 Dec - 07 Dec	Fly Play	direct
10 Dec - 17 Dec	easyJet
04 Dec - 14 Dec	Fly Play	direct
07 Dec - 11 Dec	Fly Play	direct
04 Dec - 11 Dec	Fly Play	direct
11 Dec - 15 Dec	Vueling Airlines
08 Dec - 12 Dec	easyJet
02 Dec - 09 Dec	Vueling Airlines
05 Dec - 09 Dec	Wizz Air Malta
06 Dec - 12 Dec	easyJet
31 Dec - 04 Jan	Vueling Airlines
30 Dec - 04 Jan	Vueling Airlines
23 Dec - 01 Jan	easyJet
28 Dec - 04 Jan	Fly Play	direct
26 Dec - 05 Jan	Ryanair
27 Dec - 03 Jan	Vueling Airlines
23 Dec - 01 Jan	Icelandair	direct

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 $185

Return flights