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

Return flights

10 Sep - 29 Oct	Jetstar
03 Sep - 11 Sep	Jetstar
01 Sep - 16 Sep	Jetstar
29 Sep - 14 Oct	Jetstar
29 Sep - 16 Oct	Jetstar
03 Sep - 23 Sep	Jetstar
07 Sep - 15 Oct	Singapore Airlines
29 Sep - 18 Oct	Jetstar
08 Sep - 22 Sep	Singapore Airlines
09 Sep - 17 Sep	Singapore Airlines
08 Sep - 20 Sep	Jetstar
26 Sep - 14 Oct	Jetstar
22 Sep - 10 Oct	Jetstar
22 Sep - 12 Oct	Jetstar
12 Sep - 21 Sep	Jetstar
18 Sep - 15 Oct	Singapore Airlines
05 Sep - 15 Oct	Singapore Airlines

Also check the deals for one-way flights from Adelaide to Seoul in September.

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 Adelaide to Seoul in September from 680€

Return flights