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

Return flights

15 Dec - 22 Dec	Batik Air Malaysia
16 Dec - 17 Dec	Batik Air Malaysia
13 Dec - 15 Dec	VietJet Air
11 Dec - 22 Dec	T'way Air
13 Dec - 15 Dec	T'way Air	direct
16 Dec - 17 Dec	T'way Air	direct
16 Dec - 21 Dec	T'way Air	direct
15 Dec - 21 Dec	T'way Air	direct
11 Dec - 22 Dec	T'way Air	direct
15 Dec - 22 Dec	T'way Air	direct
31 Dec - 20 Jan	AirAsia X
31 Dec - 31 Jan	Air China
16 Dec - 16 Jan	Batik Air Malaysia
30 Dec - 22 Jan	AirAsia X
31 Dec - 06 Jan	Scoot
29 Dec - 15 Jan	T'way Air
28 Dec - 28 Jan	Scoot
27 Dec - 31 Jan	Air China
31 Dec - 30 Jan	Air China
30 Dec - 14 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.

Book a cheap hotel in Seoul

Cheap car rent in Seoul

Cheapest return flights from Sydney to Seoul in December from $634

Return flights