AirHint found the following cheapest return flights from Seoul (GMP) to Jakarta (CGK) in September 2025 (see full year).

Return flights

11 Sep - 15 Sep	China Eastern
19 Sep - 21 Sep	China Eastern
01 Sep - 07 Sep	Eastar Jet
22 Sep - 28 Sep	Air China
12 Sep - 20 Sep	Air China
12 Sep - 15 Sep	Air China
28 Sep - 02 Oct	Air China
21 Sep - 28 Sep	Air China
22 Sep - 29 Sep	Air China
22 Sep - 27 Sep	Air China
26 Sep - 28 Sep	Air China
27 Sep - 07 Oct	Air China
27 Sep - 04 Oct	Air China
28 Sep - 06 Oct	Air China
28 Sep - 07 Oct	Air China
27 Sep - 11 Oct	Air China
06 Sep - 01 Oct	Japan Airlines
10 Sep - 01 Oct	Japan Airlines
29 Sep - 03 Oct	Japan Airlines
30 Sep - 15 Oct	Japan Airlines

Also check the deals for one-way flights from Seoul to Jakarta 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.

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Cheapest return flights from Seoul to Jakarta in September from $328

Return flights