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

Return flights

15 Sep - 22 Sep	Air China
19 Sep - 22 Sep	Air China
20 Sep - 22 Oct	Finnair
22 Sep - 23 Oct	Finnair
20 Sep - 21 Oct	Finnair
18 Sep - 21 Oct	Finnair
21 Sep - 23 Oct	Finnair
21 Sep - 22 Oct	Finnair
17 Sep - 20 Oct	Finnair
10 Sep - 15 Sep	SWISS
19 Sep - 22 Oct	Finnair
19 Sep - 21 Oct	Finnair
14 Sep - 16 Sep	Hong Kong Airlines
16 Sep - 18 Sep	Hong Kong Airlines
18 Sep - 21 Sep	Finnair
14 Sep - 18 Sep	Hong Kong Airlines
14 Sep - 20 Sep	Hong Kong Airlines
08 Sep - 15 Sep	Hong Kong Airlines
01 Sep - 08 Sep	Hong Kong Airlines
21 Sep - 02 Oct	Lufthansa

Also check the deals for one-way flights from Hong Kong 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 Hong Kong to Brussels in September from $605

Return flights