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

Return flights

13 May - 19 May	Air China
13 May - 21 May	Air China
20 May - 31 May	Air China
11 May - 16 May	Air China
18 May - 21 May	Air China
12 May - 19 May	ANA
18 May - 24 May	Air China
20 May - 26 May	Air China
23 May - 31 May	Air China
29 May - 31 May	Air China
30 May - 07 Jun	Air China
28 May - 04 Jun	Asiana Airlines
23 May - 02 Jun	Air China
29 May - 02 Jun	Air China
22 May - 02 Jun	Air China
29 May - 07 Jun	Air China
29 May - 03 Jun	ANA
24 May - 05 Jun	Asiana Airlines
21 May - 01 Jun	ANA
29 May - 08 Jun	ANA

Also check the deals for one-way flights from Seoul to Sydney in May.

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 May from $661

Return flights