AirHint found the following cheapest one-way flights from Tokyo (NRT) to Ulaanbaatar (UBN) in December 2025 (see full year).

One-Way flights

15 Dec	Jeju Air
08 Dec	Jeju Air
20 Dec	Jeju Air
12 Dec	MIAT Mongolian Airlines	direct
14 Dec	MIAT Mongolian Airlines	direct
16 Dec	Asiana Airlines
07 Dec	Asiana Airlines
30 Dec	Korean Air
27 Dec	Korean Air
28 Dec	Korean Air

Also check the deals for return flights from Tokyo to Ulaanbaatar in December.

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 one-way flights from Tokyo to Ulaanbaatar in December from 175€

One-Way flights