AirHint found the following cheapest one-way flights from Busan (PUS) to Ulaanbaatar (UBN) in May 2026 (see full year).
One-Way flights
| 10 May | Jeju Air | direct | |
| 16 May | Jeju Air | direct | |
| 23 May | Jeju Air | direct | |
| 03 May | Jeju Air | direct | |
| 02 May | Jeju Air | direct | |
| 22 May | Jin Air | direct | |
| 01 May | Asiana Airlines | direct |
Also check the deals for return flights from Busan 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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