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

Return flights

13 Jan - 20 Jan	Jeju Air
19 Jan - 28 Jan	Asiana Airlines
29 Jan - 09 Feb	China Eastern
25 Jan - 02 Feb	Air Busan
13 Jan - 16 Jan	Eastar Jet
01 Jan - 08 Jan	China Southern
20 Jan - 23 Jan	Air Busan
02 Jan - 08 Jan	Air China
01 Jan - 21 Jan	Air China
01 Jan - 10 Jan	Air China
01 Jan - 12 Jan	Air China
01 Jan - 09 Jan	Air China
31 Jan - 08 Feb	Air China
19 Jan - 15 Feb	Air China
28 Jan - 02 Feb	Air China
31 Jan - 09 Feb	Air China
31 Jan - 07 Feb	Air China
19 Jan - 03 Feb	Air China
30 Jan - 06 Feb	Air China
27 Jan - 06 Feb	Air China

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

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 January from 561€

Return flights