Cheapest one-way flights from Hong Kong to Ulaanbaatar in September from $158

AirHint found the following cheapest one-way flights from Hong Kong (HKG) to Ulaanbaatar (UBN) in September 2025 (see full year).

One-Way flights

18 Sep HK Express
26 Sep T'way Air
19 Sep HK Express
15 Sep HK Express
10 Sep T'way Air
05 Sep T'way Air
19 Sep MIAT Mongolian Airlines direct
03 Sep MIAT Mongolian Airlines direct
15 Sep MIAT Mongolian Airlines direct
18 Sep MIAT Mongolian Airlines direct

Also check the deals for return flights from Hong Kong to Ulaanbaatar in September.

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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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