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

Return flights

01 Dec - 06 Dec	Wizz Air
04 Dec - 07 Dec	Ryanair
12 Dec - 30 Dec	Ryanair
01 Dec - 08 Dec	Wizz Air
05 Dec - 07 Dec	Wizz Air
01 Dec - 04 Dec	Wizz Air
01 Dec - 07 Dec	Wizz Air
11 Dec - 17 Dec	Ryanair
11 Dec - 28 Dec	Ryanair
09 Dec - 16 Dec	Ryanair
30 Dec - 07 Jan	Ryanair
31 Dec - 04 Jan	Ryanair
18 Dec - 04 Jan	Ryanair
22 Dec - 01 Jan	Ryanair
24 Dec - 01 Jan	Ryanair
31 Dec - 08 Jan	LOT
24 Dec - 04 Jan	Ryanair
25 Dec - 01 Jan	Lufthansa
24 Dec - 01 Jan	Icelandair	direct
23 Dec - 01 Jan	Ryanair

Also check the deals for one-way flights from Brussels 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 Brussels to Keflavik in December from 177€

Return flights