AirHint found the following cheapest one-way flights from Seoul (GMP) to Singapore (SIN) in September 2025 (see full year).
One-Way flights
| 02 Sep | T'way Air | ||
| 22 Sep | Air Busan | ||
| 18 Sep | Korean Air | ||
| 04 Sep | Air Busan | ||
| 12 Sep | Jeju Air | ||
| 05 Sep | T'way Air | ||
| 29 Sep | Jeju Air | ||
| 20 Sep | Air Busan | ||
| 27 Sep | Jeju Air | ||
| 28 Sep | Air Busan |
Also check the deals for return flights from Seoul to Singapore 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.
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