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

Return flights

10 Sep - 24 Sep	VietJet Air
22 Sep - 23 Sep	AirAsia X
09 Sep - 23 Sep	AirAsia X
10 Sep - 16 Sep	Scoot
17 Sep - 23 Sep	AirAsia X
15 Sep - 23 Sep	Scoot
18 Sep - 23 Sep	AirAsia X
10 Sep - 17 Sep	VietJet Air
10 Sep - 14 Sep	Scoot
15 Sep - 20 Sep	Scoot
10 Sep - 05 Oct	Scoot
22 Sep - 04 Oct	Scoot
22 Sep - 01 Oct	Jeju Air
22 Sep - 02 Oct	Jeju Air
22 Sep - 03 Oct	Jeju Air
22 Sep - 05 Oct	AirAsia X
24 Sep - 02 Oct	AirAsia X
24 Sep - 14 Oct	AirAsia X
17 Sep - 05 Oct	AirAsia X
18 Sep - 05 Oct	AirAsia X

Also check the deals for one-way flights from Seoul 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 Seoul to Perth in September from $437

Return flights