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

Return flights

21 Oct - 24 Oct	HK Express
22 Oct - 27 Oct	HK Express
25 Oct - 28 Oct	HK Express
25 Oct - 01 Nov	HK Express
25 Oct - 29 Oct	HK Express
22 Oct - 27 Oct	MIAT Mongolian Airlines	direct
30 Oct - 06 Nov	MIAT Mongolian Airlines	direct
10 Oct - 17 Oct	MIAT Mongolian Airlines	direct
16 Oct - 25 Oct	MIAT Mongolian Airlines	direct
14 Oct - 18 Oct	HK Express
03 Oct - 11 Oct	MIAT Mongolian Airlines
05 Oct - 11 Oct	MIAT Mongolian Airlines
31 Oct - 05 Nov	Air China

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

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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Cheapest return flights from Hong Kong to Ulaanbaatar in October from 294€

Return flights