AirHint found the following cheapest return flights from Osaka (KIX) to Seoul (ICN) in January 2026 (see full year).

Return flights

21 Jan - 24 Jan	Peach	direct
05 Jan - 08 Jan	Peach	direct
07 Jan - 11 Jan	Peach	direct
12 Jan - 16 Jan	Peach	direct
09 Jan - 13 Jan	Peach	direct
13 Jan - 16 Jan	Korean Air	direct
20 Jan - 23 Jan	Korean Air	direct
22 Jan - 26 Jan	Korean Air	direct
15 Jan - 18 Jan	Korean Air	direct
12 Jan - 14 Jan	Korean Air	direct
15 Jan - 05 Feb	Korean Air	direct
29 Jan - 01 Feb	Korean Air	direct
30 Jan - 02 Feb	Korean Air	direct

Also check the deals for one-way flights from Osaka to Seoul in January.

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 Seoul in January from 120€

Return flights