AirHint found the following cheapest return flights from Osaka (ITM) to Busan (PUS) in September 2025 (see full year).

Return flights

18 Sep - 21 Sep	ANA
03 Sep - 10 Sep	Ibex Airlines
17 Sep - 24 Sep	Ibex Airlines
09 Sep - 16 Sep	ANA
17 Sep - 21 Sep	ANA
04 Sep - 10 Sep	Ibex Airlines
12 Sep - 19 Sep	Ibex Airlines
04 Sep - 08 Sep	ANA
06 Sep - 13 Sep	ANA
04 Sep - 06 Sep	ANA
27 Sep - 01 Oct	ANA
29 Sep - 01 Oct	Japan Airlines
28 Sep - 01 Oct	Japan Airlines
30 Sep - 16 Oct	Japan Airlines
30 Sep - 01 Oct	Japan Airlines

Also check the deals for one-way flights from Osaka to Busan 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 Osaka to Busan in September from $346

Return flights