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

Return flights

23 Sep - 30 Sep	Asiana Airlines
26 Sep - 29 Sep	Asiana Airlines
26 Sep - 30 Sep	Asiana Airlines
22 Sep - 29 Sep	Asiana Airlines
24 Sep - 30 Sep	Asiana Airlines
09 Sep - 13 Sep	Asiana Airlines
16 Sep - 19 Sep	Asiana Airlines
09 Sep - 19 Sep	Asiana Airlines
09 Sep - 16 Sep	Asiana Airlines
10 Sep - 16 Sep	Asiana Airlines
26 Sep - 04 Oct	Air China
26 Sep - 03 Oct	Air China
26 Sep - 01 Oct	Air China
23 Sep - 08 Oct	Air China
24 Sep - 05 Oct	Air China
25 Sep - 02 Oct	Air China
27 Sep - 05 Oct	Air China

Also check the deals for one-way flights from Tokyo to Ulaanbaatar in September.

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 Tokyo to Ulaanbaatar in September from 420€

Return flights