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

Return flights

18 May - 21 May	Korean Air	direct
10 May - 12 May	Korean Air	direct
17 May - 22 May	Korean Air	direct
17 May - 20 May	Korean Air	direct
27 May - 29 May	Korean Air	direct
20 May - 27 May	Korean Air	direct
12 May - 19 May	Korean Air	direct
28 May - 31 May	Korean Air	direct
29 May - 31 May	Korean Air	direct
07 May - 11 May	Korean Air	direct

Also check the deals for one-way 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 return flights from Seoul to Osaka in May from 205€

Return flights