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
20 Sep - 27 Sep	IndiGo
28 Sep - 01 Oct	IndiGo
29 Sep - 02 Oct	IndiGo
12 Sep - 16 Sep	IndiGo
05 Sep - 18 Sep	IndiGo
01 Sep - 19 Sep	IndiGo
05 Sep - 20 Sep	IndiGo
22 Sep - 29 Sep	Singapore Airlines	direct
08 Sep - 15 Sep	Singapore Airlines	direct
05 Sep - 20 Sep	Singapore Airlines	direct
05 Sep - 18 Sep	Singapore Airlines	direct
29 Sep - 02 Oct	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 516€

Return flights