AirHint found the following cheapest return flights from Hanoi (HAN) to Ulaanbaatar (UBN) in December 2025 (see full year).
Return flights
| 16 Dec - 02 Jan | Aero Mongolia | direct | |
| 23 Dec - 30 Dec | Cathay Pacific | ||
| 26 Dec - 02 Jan | Korean Air | ||
| 18 Dec - 23 Dec | Korean Air |
Also check the deals for one-way flights from Hanoi to Ulaanbaatar in December.
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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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