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

Return flights

08 Sep - 22 Sep	Scoot
08 Sep - 15 Sep	Scoot
09 Sep - 11 Sep	Hainan Airlines
02 Sep - 15 Sep	Scoot
02 Sep - 08 Sep	Scoot
08 Sep - 16 Sep	Scoot
02 Sep - 09 Sep	Scoot
04 Sep - 08 Sep	Hainan Airlines
11 Sep - 22 Sep	Hainan Airlines
15 Sep - 22 Sep	Scoot
23 Sep - 29 Oct	Scoot
23 Sep - 30 Oct	Scoot
21 Sep - 19 Oct	Scoot
23 Sep - 28 Oct	Scoot
04 Sep - 15 Oct	Malaysia Airlines
30 Sep - 07 Oct	Hainan Airlines
30 Sep - 21 Oct	Jetstar	direct
28 Sep - 19 Oct	Scoot
18 Sep - 01 Oct	Xiamen Airlines
15 Sep - 15 Oct	VietJet Air

Also check the deals for one-way flights from Sydney to Seoul 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 Seoul in September from 337€

Return flights