Cheapest return flights from Hong Kong to Ulaanbaatar in September from 312€

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

Return flights

18 Sep - 25 Sep HK Express
09 Sep - 12 Sep HK Express
14 Sep - 21 Sep HK Express
23 Sep - 26 Sep HK Express
07 Sep - 14 Sep HK Express
18 Sep - 24 Sep HK Express
14 Sep - 22 Sep HK Express
06 Sep - 10 Sep HK Express
27 Sep - 06 Oct HK Express
06 Sep - 14 Sep Air China
16 Sep - 23 Sep Air China
30 Sep - 07 Oct HK Express
26 Sep - 02 Oct T'way Air
29 Sep - 05 Oct MIAT Mongolian Airlines direct
30 Sep - 08 Oct HK Express
30 Sep - 07 Oct Cathay Pacific direct
26 Sep - 02 Oct Cathay Pacific direct
30 Sep - 08 Oct Cathay Pacific direct
27 Sep - 06 Oct 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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