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

Return flights

24 Sep - 28 Sep	Air Busan
19 Sep - 21 Sep	Jeju Air
15 Sep - 19 Sep	Air Busan
20 Sep - 24 Sep	Air Busan
02 Sep - 08 Sep	Eastar Jet
13 Sep - 17 Sep	Jin Air
06 Sep - 10 Sep	China Eastern
11 Sep - 18 Sep	Air Busan
04 Sep - 07 Sep	Air Busan
04 Sep - 09 Sep	Air Busan
27 Sep - 14 Oct	EVA Air
24 Sep - 02 Oct	EVA Air
27 Sep - 02 Oct	EVA Air
09 Sep - 14 Oct	EVA Air
27 Sep - 03 Oct	EVA Air
27 Sep - 13 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 287€

Return flights