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

Return flights

02 Dec - 07 Dec	Ryanair
11 Dec - 18 Dec	Ryanair
14 Dec - 18 Dec	Ryanair
01 Dec - 07 Dec	Ryanair
11 Dec - 15 Dec	Ryanair
08 Dec - 14 Dec	Scandinavian Airlines
05 Dec - 07 Dec	Wizz Air
11 Dec - 28 Dec	Ryanair
05 Dec - 11 Dec	Wizz Air
09 Dec - 14 Dec	Ryanair
30 Dec - 09 Jan	Wizz Air
31 Dec - 05 Jan	Ryanair
24 Dec - 01 Jan	Ryanair
23 Dec - 01 Jan	Ryanair
30 Dec - 05 Jan	Ryanair
30 Dec - 01 Jan	Ryanair
27 Dec - 06 Jan	Ryanair
23 Dec - 04 Jan	Ryanair
24 Dec - 04 Jan	Ryanair
28 Dec - 01 Jan	Finnair

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 $230

Return flights