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

Return flights

08 Sep - 15 Sep	Scoot Tigerair
03 Sep - 18 Sep	Jetstar
01 Sep - 17 Sep	China Southern
01 Sep - 21 Sep	China Southern
03 Sep - 17 Sep	Jetstar
14 Sep - 22 Sep	Etihad Airways
16 Sep - 21 Oct	Turkish Airlines
13 Sep - 05 Oct	Etihad Airways
07 Sep - 22 Sep	Etihad Airways
29 Sep - 08 Oct	Etihad Airways
05 Sep - 16 Sep	China Southern
01 Sep - 08 Sep	China Southern
16 Sep - 23 Sep	Turkish Airlines
16 Sep - 14 Oct	China Southern
21 Sep - 29 Oct	Turkish Airlines
29 Sep - 13 Oct	Etihad Airways
19 Sep - 01 Oct	Scoot Tigerair
10 Sep - 08 Oct	Turkish Airlines
17 Sep - 06 Oct	Turkish Airlines
22 Sep - 27 Oct	Etihad Airways

Also check the deals for one-way flights from Sydney to Dublin 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 Sydney to Dublin in September from 886€

Return flights