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

Return flights

09 Dec - 16 Dec	Aero Mongolia	direct
12 Dec - 19 Dec	Aero Mongolia	direct
02 Dec - 09 Dec	Aero Mongolia	direct
05 Dec - 12 Dec	Aero Mongolia	direct
03 Dec - 10 Dec	MIAT Mongolian Airlines
04 Dec - 11 Dec	MIAT Mongolian Airlines
14 Dec - 21 Dec	Aero Mongolia	direct
10 Dec - 17 Dec	MIAT Mongolian Airlines
07 Dec - 14 Dec	MIAT Mongolian Airlines
11 Dec - 18 Dec	MIAT Mongolian Airlines
26 Dec - 02 Jan	Korean Air
26 Dec - 04 Jan	Korean Air
28 Dec - 06 Jan	Korean Air

Also check the deals for one-way flights from Ulaanbaatar to Tokyo 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 return flights from Ulaanbaatar to Tokyo in December from 336€

Return flights