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

Return flights

25 Sep - 28 Sep	T'way Air
07 Sep - 14 Sep	Air Busan
27 Sep - 17 Oct	T'way Air
04 Sep - 12 Sep	T'way Air
18 Sep - 19 Sep	T'way Air
06 Sep - 10 Sep	T'way Air
16 Sep - 21 Sep	T'way Air
16 Sep - 19 Sep	T'way Air
18 Sep - 21 Sep	T'way Air
06 Sep - 08 Sep	Jeju Air
30 Sep - 20 Oct	T'way Air
09 Sep - 12 Sep	T'way Air
27 Sep - 08 Oct	Jeju Air
27 Sep - 01 Oct	T'way Air
28 Sep - 18 Oct	Jeju Air
29 Sep - 12 Oct	T'way Air
27 Sep - 08 Oct	MIAT Mongolian Airlines	direct
30 Sep - 09 Oct	Air China
22 Sep - 11 Oct	Air China
29 Sep - 03 Oct	Cathay Pacific

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 $314

Return flights