AirHint found the following cheapest one-way flights from Osaka (KIX) to Seoul (ICN) in August 2025 (see full year).

One-Way flights

15 Aug	Peach	direct
20 Aug	Peach	direct
29 Aug	Peach	direct
28 Aug	Peach	direct
25 Aug	Peach	direct
16 Aug	Peach	direct
18 Aug	Eastar Jet	direct
11 Aug	Peach	direct
02 Aug	Peach	direct
06 Aug	Peach	direct

Also check the deals for return flights from Osaka to Seoul in August.

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 one-way flights from Osaka to Seoul in August from 48€

One-Way flights