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

Return flights

23 Aug - 30 Aug	Scandinavian Airlines
16 Aug - 23 Aug	Scandinavian Airlines
14 Aug - 21 Aug	Scandinavian Airlines
31 Aug - 07 Sep	Icelandair
27 Aug - 03 Sep	Icelandair
25 Aug - 01 Sep	Icelandair
10 Aug - 19 Aug	United
20 Aug - 27 Aug	United	direct
14 Aug - 21 Aug	Brussels Airlines	direct
15 Aug - 22 Aug	United	direct
17 Aug - 24 Aug	United	direct
21 Aug - 28 Aug	Icelandair
21 Aug - 28 Aug	United	direct
25 Aug - 01 Sep	United	direct
29 Aug - 05 Sep	United	direct
31 Aug - 07 Sep	United	direct

Also check the deals for one-way flights from Washington to Brussels in August.

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 August from 417€

Return flights