AirHint found the following cheapest return flights from Boston (BOS) to Brussels (BRU) in September 2026 (see full year).

Return flights

01 Sep - 07 Sep	Air Canada
01 Sep - 11 Sep	SWISS
01 Sep - 14 Sep	Air Canada
01 Sep - 15 Sep	Air Canada
02 Sep - 16 Sep	Air Canada
01 Sep - 22 Sep	Air Canada
08 Sep - 29 Sep	Air Canada
09 Sep - 30 Sep	Air Canada
02 Sep - 29 Sep	Air Canada
08 Sep - 25 Sep	Air Canada
09 Sep - 02 Oct	Air Canada
11 Sep - 09 Oct	Air Canada

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

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 Boston to Brussels in September from $389

Return flights