Cheapest return flights from Washington to Brussels in September from 409€

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

Return flights

01 Sep - 07 Sep Scandinavian Airlines
15 Sep - 29 Sep Scandinavian Airlines
29 Sep - 13 Oct Scandinavian Airlines
10 Sep - 24 Sep Scandinavian Airlines
17 Sep - 24 Sep Scandinavian Airlines
19 Sep - 27 Sep Scandinavian Airlines
08 Sep - 15 Sep Icelandair
05 Sep - 12 Sep Icelandair
12 Sep - 21 Sep Scandinavian Airlines
11 Sep - 18 Sep Icelandair
14 Sep - 21 Sep Icelandair
26 Sep - 03 Oct Icelandair
22 Sep - 08 Oct United direct
29 Sep - 13 Oct United direct
26 Sep - 03 Oct United direct
29 Sep - 06 Oct United direct

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

Skyscanner

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

Feel free to contact us with any feedback or request another flight research.