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

One-Way flights

16 Dec	Peach	direct
09 Dec	Peach	direct
02 Dec	Peach	direct
17 Dec	Peach	direct
12 Dec	Peach	direct
06 Dec	Peach	direct
07 Dec	Eastar Jet	direct
23 Dec	Jin Air	direct
10 Dec	Jin Air	direct
11 Dec	Eastar Jet	direct

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

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 December from 48€

One-Way flights