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

Return flights

16 Oct - 23 Oct	Scandinavian Airlines
16 Oct - 26 Oct	Ryanair
04 Oct - 23 Oct	Ryanair
04 Oct - 11 Oct	Lufthansa
16 Oct - 20 Oct	Ryanair
06 Oct - 11 Oct	Lufthansa
20 Oct - 25 Oct	Scandinavian Airlines
14 Oct - 21 Oct	Austrian Airlines
04 Oct - 12 Oct	Ryanair
04 Oct - 16 Oct	Ryanair
31 Oct - 09 Nov	Ryanair
30 Oct - 09 Nov	Scandinavian Airlines
30 Oct - 03 Nov	Scandinavian Airlines
30 Oct - 07 Nov	Scandinavian Airlines
24 Oct - 01 Nov	Ryanair
30 Oct - 07 Nov	Icelandair	direct
30 Oct - 09 Nov	Icelandair	direct
25 Oct - 01 Nov	Ryanair
31 Oct - 09 Nov	Icelandair	direct

Also check the deals for one-way flights from Brussels to Keflavik in October.

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 October from 176€

Return flights