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

Return flights

07 Sep - 10 Sep	Air Busan
23 Sep - 30 Sep	Jin Air
22 Sep - 25 Sep	Air Busan
22 Sep - 26 Sep	Air Busan
12 Sep - 16 Sep	Jeju Air
16 Sep - 19 Sep	Air Busan
13 Sep - 17 Sep	Jin Air
20 Sep - 23 Sep	Jin Air
18 Sep - 22 Sep	Air Busan
04 Sep - 08 Sep	Jeju Air
14 Sep - 14 Oct	China Eastern
23 Sep - 20 Oct	EVA Air
24 Sep - 03 Oct	EVA Air
24 Sep - 14 Oct	EVA Air
10 Sep - 02 Oct	EVA Air
23 Sep - 02 Oct	EVA Air

Also check the deals for one-way flights from Seoul to Denpasar 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 Denpasar in September from 286€

Return flights