AirHint found the following cheapest one-way flights from Seoul (GMP) to Cheju (CJU) in August 2026 (see full year).
One-Way flights
| 21 Aug | Korean Air | direct | |
| 01 Aug | Korean Air | direct | |
| 06 Aug | Asiana Airlines | direct |
Also check the deals for return flights from Seoul to Cheju in August.
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