AirHint found the following cheapest return flights from Seoul (GMP) to Osaka (KIX) in October 2025 (see full year).

Return flights

29 Oct - 06 Nov	Jeju Air
30 Oct - 05 Nov	T'way Air
30 Oct - 06 Nov	T'way Air
29 Oct - 05 Nov	Eastar Jet
29 Oct - 04 Nov	Peach	direct
28 Oct - 05 Nov	T'way Air
28 Oct - 04 Nov	Jin Air
28 Oct - 04 Nov	Peach	direct
27 Oct - 28 Oct	Jeju Air
28 Oct - 05 Nov	Peach	direct
29 Oct - 06 Nov	Jeju Air	direct
28 Oct - 30 Oct	T'way Air
28 Oct - 30 Oct	Peach	direct
26 Oct - 29 Oct	Asiana Airlines	direct
29 Oct - 29 Oct	Peach	direct
28 Oct - 31 Oct	T'way Air
26 Oct - 27 Oct	Asiana Airlines	direct
26 Oct - 28 Oct	Eastar Jet
27 Oct - 30 Oct	Jeju Air
27 Oct - 31 Oct	Jeju Air

Also check the deals for one-way 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 return flights from Seoul to Osaka in October from $165

Return flights