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

Return flights

22 Oct - 24 Oct	easyJet
23 Oct - 25 Oct	Wizz Air
10 Oct - 13 Oct	Fly Play
10 Oct - 20 Oct	Fly Play
10 Oct - 20 Oct	Icelandair	direct
17 Oct - 20 Oct	Icelandair	direct
10 Oct - 13 Oct	Icelandair	direct
17 Oct - 17 Oct	LOT
23 Oct - 25 Oct	Icelandair	direct

Also check the deals for one-way flights from Keflavik to Brussels 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 Keflavik to Brussels in October from $276

Return flights