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

Return flights

04 Dec - 07 Dec	Jetstar
04 Dec - 11 Dec	Jetstar	direct
04 Dec - 14 Dec	Garuda Indonesia
01 Dec - 11 Dec	Jetstar
01 Dec - 07 Dec	Jetstar
03 Dec - 10 Dec	Jetstar
01 Dec - 06 Dec	Jetstar	direct
03 Dec - 08 Dec	Jetstar
01 Dec - 08 Dec	Jetstar	direct
03 Dec - 06 Dec	Jetstar
01 Dec - 30 Jan	Scoot
09 Dec - 02 Jan	Jetstar	direct
08 Dec - 02 Jan	Jetstar	direct
08 Dec - 04 Jan	Jetstar	direct
11 Dec - 02 Jan	Jetstar	direct
10 Dec - 02 Jan	Jetstar	direct
02 Dec - 27 Jan	China Airlines
05 Dec - 19 Jan	Jetstar	direct
08 Dec - 06 Jan	Jetstar	direct
30 Dec - 30 Jan	Scoot

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

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 December from 431€

Return flights