Cheapest return flights from Hong Kong to Ulaanbaatar in September from $415

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

04 Sep - 07 Sep HK Express
10 Sep - 13 Sep HK Express
28 Sep - 11 Oct HK Express
17 Sep - 24 Sep T'way Air
20 Sep - 27 Sep HK Express
01 Sep - 12 Sep T'way Air
17 Sep - 24 Sep Cathay Pacific direct
20 Sep - 27 Sep Cathay Pacific direct
10 Sep - 13 Sep Cathay Pacific direct
04 Sep - 07 Sep Cathay Pacific direct
01 Sep - 12 Sep Cathay Pacific direct

Also check the deals for one-way 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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