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

Return flights

23 Sep - 28 Oct	Ryanair
24 Sep - 19 Oct	Ryanair
23 Sep - 30 Sep	Turkish Airlines
22 Sep - 20 Oct	Ryanair
24 Sep - 08 Oct	Etihad Airways
25 Sep - 02 Oct	Turkish Airlines
24 Sep - 24 Oct	Etihad Airways
21 Sep - 06 Oct	Etihad Airways
19 Sep - 08 Oct	Etihad Airways
17 Sep - 30 Oct	Qatar Airways
28 Sep - 05 Oct	Turkish Airlines
22 Sep - 30 Sep	Ryanair
17 Sep - 30 Sep	IndiGo
16 Sep - 30 Sep	Ryanair
16 Sep - 23 Sep	IndiGo
19 Sep - 22 Sep	IndiGo
24 Sep - 29 Sep	Etihad Airways
19 Sep - 21 Sep	Etihad Airways
20 Sep - 21 Sep	Etihad Airways
22 Sep - 29 Sep	Pegasus Airlines

Also check the deals for one-way flights from Dublin to Perth 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 Perth in September from $845

Return flights