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

Return flights

20 Oct - 31 Oct	Scandinavian Airlines
21 Oct - 04 Nov	Scandinavian Airlines
17 Oct - 28 Oct	Scandinavian Airlines
02 Oct - 09 Oct	Icelandair
05 Oct - 12 Oct	Icelandair
18 Oct - 23 Oct	Scandinavian Airlines
04 Oct - 10 Oct	Scandinavian Airlines
17 Oct - 25 Oct	Scandinavian Airlines
24 Oct - 07 Nov	Icelandair
10 Oct - 17 Oct	Icelandair
21 Oct - 04 Nov	United	direct
20 Oct - 31 Oct	United	direct
15 Oct - 22 Oct	United	direct
30 Oct - 06 Nov	Icelandair
24 Oct - 07 Nov	United	direct
30 Oct - 06 Nov	United	direct
25 Oct - 01 Nov	United	direct

Also check the deals for one-way flights from Washington 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 Washington to Brussels in October from 297€

Return flights