AirHint found the following cheapest one-way flights from Seoul (GMP) to Ulaanbaatar (UBN) in May 2026 (see full year).
One-Way flights
| 05 May | Air Busan | ||
| 20 May | Jeju Air | ||
| 09 May | Air Busan | ||
| 28 May | T'way Air | ||
| 27 May | Air Busan | ||
| 23 May | Air Busan | ||
| 17 May | Air Busan | ||
| 25 May | Air Busan | ||
| 19 May | Air Busan | ||
| 30 May | T'way Air |
Also check the deals for return flights from Seoul to Ulaanbaatar in May.
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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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