Cheapest return flights from Hong Kong to Ulaanbaatar in May from $353

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 May 2025 (see full year).

Return flights

16 May - 23 May Air China
03 May - 11 May Air China
09 May - 14 May Air China
17 May - 21 May Air China
22 May - 29 May Air China
23 May - 01 Jun Air China
04 May - 11 May Air China
16 May - 23 May MIAT Mongolian Airlines direct
01 May - 06 May MIAT Mongolian Airlines direct
01 May - 07 May MIAT Mongolian Airlines direct
01 May - 10 May MIAT Mongolian Airlines direct
23 May - 01 Jun Cathay Pacific direct

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

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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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