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

One-Way flights

11 Apr	Asiana Airlines	direct
07 Apr	Asiana Airlines	direct
23 Apr	Asiana Airlines	direct
10 Apr	Asiana Airlines	direct
28 Apr	Asiana Airlines	direct
19 Apr	Korean Air	direct
22 Apr	Asiana Airlines	direct
05 Apr	Asiana Airlines	direct
06 Apr	Korean Air	direct
17 Apr	Asiana Airlines	direct

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

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 April from 146€

One-Way flights