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

Return flights

18 Dec - 20 Dec	VietJet Air
31 Dec - 16 Jan	Scoot
26 Dec - 31 Dec	Scoot
31 Dec - 14 Jan	Scoot
30 Dec - 16 Jan	Scoot
30 Dec - 18 Jan	Scoot
31 Dec - 07 Jan	Scoot
25 Dec - 29 Dec	Asiana Airlines	direct
29 Dec - 31 Dec	T'way Air	direct
31 Dec - 22 Jan	Scoot
31 Dec - 18 Jan	Scoot
25 Dec - 31 Dec	Air China
25 Dec - 05 Jan	Air China
30 Dec - 07 Jan	T'way Air
17 Dec - 22 Dec	Philippine Airlines
28 Dec - 14 Jan	Scoot
17 Dec - 19 Dec	Philippine Airlines
17 Dec - 20 Dec	Philippine Airlines
20 Dec - 21 Dec	T'way Air	direct
17 Dec - 23 Dec	Philippine Airlines

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 645€

Return flights