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

Return flights

11 Dec - 14 Dec	MIAT Mongolian Airlines	direct
16 Dec - 17 Dec	MIAT Mongolian Airlines
12 Dec - 17 Dec	Air China
30 Dec - 13 Jan	Asiana Airlines
19 Dec - 22 Dec	MIAT Mongolian Airlines
18 Dec - 24 Dec	MIAT Mongolian Airlines
31 Dec - 06 Jan	Jeju Air
21 Dec - 11 Jan	Korean Air
21 Dec - 09 Jan	Korean Air
12 Dec - 18 Dec	Asiana Airlines
29 Dec - 08 Jan	Jeju Air
16 Dec - 18 Dec	Korean Air
23 Dec - 26 Dec	Jeju Air
14 Dec - 16 Dec	Jin Air
31 Dec - 02 Jan	Jeju Air
22 Dec - 31 Dec	Air China
23 Dec - 05 Jan	Air China
24 Dec - 06 Jan	Asiana Airlines
24 Dec - 07 Jan	Eastar Jet
25 Dec - 11 Jan	Jeju Air

Also check the deals for one-way 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 return flights from Tokyo to Ulaanbaatar in December from $453

Return flights