AirHint found the following cheapest one-way flights from Seoul (ICN) to Osaka (KIX) in May 2026 (see full year).

One-Way flights

29 May	Korean Air	direct
30 May	Korean Air	direct
16 May	Korean Air	direct
27 May	Korean Air	direct
31 May	Korean Air	direct
19 May	Korean Air	direct
26 May	Korean Air	direct
04 May	Korean Air	direct
03 May	Asiana Airlines	direct

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

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 May from 134€

One-Way flights