Cheapest return flights from Hong Kong to Ulaanbaatar in September from $496

Best time to book flights for Hong Kong (HKG) to Ulaanbaatar (UBN) flights at AirHint

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

Return flights

16 Sep - 23 Sep T'way Air
22 Sep - 07 Oct HK Express
15 Sep - 24 Sep MIAT Mongolian Airlines direct
17 Sep - 24 Sep Cathay Pacific direct
18 Sep - 25 Sep Cathay Pacific direct
16 Sep - 23 Sep Cathay Pacific direct
22 Sep - 07 Oct Cathay Pacific direct

Also check the deals for one-way flights from Hong Kong to Ulaanbaatar in September.

Skyscanner

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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