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

Return flights

22 Sep - 29 Sep	IndiGo
23 Sep - 30 Sep	IndiGo
09 Sep - 16 Sep	Turkish Airlines
08 Sep - 15 Sep	IndiGo
24 Sep - 07 Oct	Qatar Airways
02 Sep - 11 Sep	IndiGo
20 Sep - 04 Oct	Qatar Airways
01 Sep - 29 Sep	IndiGo
01 Sep - 08 Sep	IndiGo
22 Sep - 29 Sep	Singapore Airlines	direct
08 Sep - 15 Sep	Singapore Airlines	direct
01 Sep - 29 Sep	Singapore Airlines	direct

Also check the deals for one-way flights from Singapore 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 Singapore to Brussels in September from $665

Return flights