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

Return flights

01 Dec - 11 Dec	Jetstar
05 Dec - 12 Dec	Jetstar
15 Dec - 27 Dec	Jetstar
15 Dec - 22 Dec	Jetstar
16 Dec - 31 Jan	Jetstar
15 Dec - 03 Jan	Jetstar
26 Dec - 02 Jan	Jetstar
16 Dec - 27 Jan	Jetstar
25 Dec - 05 Jan	Jetstar
16 Dec - 07 Jan	Jetstar
29 Dec - 09 Jan	Jetstar
29 Dec - 08 Jan	Jetstar
22 Dec - 09 Jan	Jetstar
19 Dec - 12 Jan	Jetstar
26 Dec - 31 Dec	Singapore Airlines
20 Dec - 31 Dec	Jetstar

Also check the deals for one-way flights from Adelaide 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 Adelaide to Seoul in December from $823

Return flights