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

Return flights

13 Oct - 27 Oct	Scandinavian Airlines
27 Oct - 10 Nov	Scandinavian Airlines
30 Oct - 13 Nov	Scandinavian Airlines
16 Oct - 30 Oct	Scandinavian Airlines
01 Oct - 14 Oct	Scandinavian Airlines
12 Oct - 19 Oct	Icelandair
18 Oct - 25 Oct	Icelandair
24 Oct - 31 Oct	Icelandair
03 Oct - 10 Oct	Icelandair
29 Oct - 05 Nov	United	direct
15 Oct - 22 Oct	United	direct
11 Oct - 18 Oct	Aer Lingus
27 Oct - 10 Nov	United	direct
30 Oct - 13 Nov	United	direct
09 Oct - 16 Oct	Icelandair

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.

Book a cheap hotel in Brussels

Cheap car rent in Brussels

Cheapest return flights from Washington to Brussels in October from $442

Return flights