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

One-Way flights

11 Oct	Eastar Jet	direct
12 Oct	T'way Air	direct
22 Oct	Peach	direct
10 Oct	T'way Air	direct
28 Oct	T'way Air	direct
15 Oct	Air Seoul, Inc	direct
29 Oct	Aero K Airlines	direct
09 Oct	Jeju Air	direct
13 Oct	Jeju Air	direct
16 Oct	Peach	direct

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

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 Seoul to Osaka in October from $31

One-Way flights