Cheapest return flights from Beijing to Ulaanbaatar in September from $311

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

Return flights

27 Sep - 04 Oct MIAT Mongolian Airlines direct
27 Sep - 01 Oct MIAT Mongolian Airlines direct
22 Sep - 29 Sep MIAT Mongolian Airlines direct
23 Sep - 27 Sep Air China direct
28 Sep - 02 Oct Air China direct
19 Sep - 24 Sep Air China direct
19 Sep - 23 Sep Air China direct
19 Sep - 25 Sep Air China direct
19 Sep - 27 Sep Air China direct
25 Sep - 06 Oct Air China direct
18 Sep - 21 Sep Air China direct
30 Sep - 09 Oct Air China direct
30 Sep - 08 Oct Air China direct
29 Sep - 05 Oct Air China direct
26 Sep - 08 Oct Air China direct

Also check the deals for one-way flights from Beijing 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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