AirHint found the following cheapest one-way flights from Seoul (GMP) to Ulaanbaatar (UBN) in October 2025 (see full year).
One-Way flights
| 25 Oct | Air Busan | ||
| 05 Oct | Air China | ||
| 31 Oct | Korean Air | ||
| 18 Oct | Korean Air | ||
| 30 Oct | Korean Air | ||
| 27 Oct | Korean Air | ||
| 06 Oct | Air China |
Also check the deals for return flights from Seoul to Ulaanbaatar in October.
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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