AirHint found the following cheapest one-way flights from Seoul (GMP) to Osaka (KIX) in September 2025 (see full year).
One-Way flights
| 23 Sep | Eastar Jet | ||
| 24 Sep | Eastar Jet | ||
| 29 Sep | T'way Air | ||
| 28 Sep | T'way Air | ||
| 30 Sep | T'way Air | ||
| 25 Sep | Eastar Jet | ||
| 22 Sep | T'way Air | ||
| 23 Sep | Jeju Air | direct | |
| 29 Sep | Jeju Air | direct | |
| 30 Sep | Jeju Air | direct |
Also check the deals for return flights from Seoul to Osaka in September.
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.
Find us on social media