Cheapest one-way flights from Bangkok to Ulaanbaatar in December from $238

AirHint found the following cheapest one-way flights from Bangkok (BKK) to Ulaanbaatar (UBN) in December 2025 (see full year).

One-Way flights

11 Dec Vietnam Airlines
10 Dec Spring Airlines
20 Dec Thai Lion Air
20 Dec MIAT Mongolian Airlines direct
10 Dec MIAT Mongolian Airlines direct
23 Dec Jeju Air
21 Dec Jeju Air
30 Dec Jeju Air
25 Dec Jeju Air
24 Dec Air China

Also check the deals for return flights from Bangkok 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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