AirHint found the following cheapest one-way flights from Seoul (GMP) to Ulaanbaatar (UBN) in August 2025 (see full year).
One-Way flights
| 29 Aug | T'way Air | ||
| 24 Aug | Air Busan | ||
| 26 Aug | Jeju Air | ||
| 20 Aug | Eastar Jet | ||
| 18 Aug | Eastar Jet | ||
| 19 Aug | Eastar Jet | ||
| 22 Aug | T'way Air |
Also check the deals for return flights from Seoul to Ulaanbaatar in August.
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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