AirHint found the following cheapest return flights from Busan (PUS) to Ulaanbaatar (UBN) in May 2026 (see full year).
Return flights
| 23 May - 28 May | Jeju Air | direct | |
| 24 May - 28 May | Jeju Air | direct | |
| 14 May - 18 May | Jeju Air | direct | |
| 21 May - 25 May | Jeju Air | direct | |
| 20 May - 24 May | Jeju Air | direct | |
| 02 May - 05 May | Jeju Air |
Also check the deals for one-way 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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