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

Return flights

03 Sep - 10 Sep	Asiana Airlines
26 Sep - 29 Sep	Asiana Airlines
01 Sep - 05 Sep	Asiana Airlines
03 Sep - 09 Sep	Asiana Airlines
05 Sep - 09 Sep	Asiana Airlines
03 Sep - 06 Sep	Asiana Airlines
15 Sep - 30 Sep	Asiana Airlines
22 Sep - 23 Sep	Asiana Airlines
25 Sep - 29 Sep	Asiana Airlines
02 Sep - 05 Sep	Asiana Airlines
24 Sep - 01 Oct	Asiana Airlines
29 Sep - 06 Oct	Asiana Airlines
27 Sep - 04 Oct	Air China
26 Sep - 03 Oct	Air China
30 Sep - 03 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 $498

Return flights