AirHint found the following cheapest return flights from Seoul (GMP) to Sydney (SYD) in September 2026 (see full year).

Return flights

10 Sep - 20 Sep	ANA
02 Sep - 10 Sep	Asiana Airlines
07 Sep - 19 Sep	Air China
12 Sep - 19 Sep	Air China
04 Sep - 10 Sep	Air China
02 Sep - 06 Sep	Asiana Airlines
02 Sep - 08 Sep	Asiana Airlines
04 Sep - 08 Sep	Air China
08 Sep - 15 Sep	ANA
01 Sep - 09 Sep	ANA
28 Sep - 06 Oct	ANA
30 Sep - 11 Oct	Air China
30 Sep - 10 Oct	Air China
23 Sep - 10 Oct	ANA
23 Sep - 11 Oct	ANA
30 Sep - 05 Oct	ANA
24 Sep - 01 Oct	ANA
24 Sep - 04 Oct	ANA
24 Sep - 03 Oct	ANA
25 Sep - 01 Oct	ANA

Also check the deals for one-way flights from Seoul to Sydney 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 Sydney in September from 637€

Return flights