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

Return flights

14 Oct - 21 Oct	Aero K Airlines
25 Oct - 26 Oct	T'way Air
18 Oct - 22 Oct	T'way Air
14 Oct - 19 Oct	T'way Air
16 Oct - 20 Oct	T'way Air
13 Oct - 18 Oct	Peach
13 Oct - 19 Oct	Peach
03 Oct - 15 Oct	MIAT Mongolian Airlines
14 Oct - 21 Oct	MIAT Mongolian Airlines	direct
22 Oct - 24 Oct	Asiana Airlines
30 Oct - 03 Nov	Korean Air
31 Oct - 01 Nov	Korean Air
28 Oct - 01 Nov	Korean Air
31 Oct - 03 Nov	Korean Air
31 Oct - 05 Nov	Korean Air
29 Oct - 01 Nov	Korean Air
30 Oct - 04 Nov	Air China

Also check the deals for one-way flights from Tokyo 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 Tokyo to Ulaanbaatar in October from $275

Return flights