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

Return flights

02 Sep - 23 Sep	British Airways
17 Sep - 30 Sep	KLM
18 Sep - 30 Sep	Air France
18 Sep - 10 Oct	Air France
14 Sep - 05 Oct	Air France
16 Sep - 24 Sep	Finnair
02 Sep - 09 Sep	Finnair
17 Sep - 24 Sep	Finnair
03 Sep - 10 Sep	Finnair
05 Sep - 21 Sep	British Airways
18 Sep - 25 Sep	Finnair
07 Sep - 15 Sep	Finnair
26 Sep - 07 Oct	Air France
24 Sep - 03 Oct	SWISS
19 Sep - 03 Oct	Turkish Airlines
29 Sep - 21 Oct	Finnair
24 Sep - 04 Oct	Etihad Airways
24 Sep - 08 Oct	Finnair
14 Sep - 06 Oct	Etihad Airways
27 Sep - 08 Oct	Air France

Also check the deals for one-way flights from Dublin to Singapore 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 Dublin to Singapore in September from $519

Return flights