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

Return flights

16 Dec - 21 Dec	Aero Mongolia	direct
26 Dec - 30 Dec	Aero Mongolia	direct
10 Dec - 17 Dec	MIAT Mongolian Airlines
10 Dec - 12 Dec	Air China
06 Dec - 08 Dec	Air China
12 Dec - 16 Dec	Air China
24 Dec - 31 Dec	Jeju Air
10 Dec - 11 Dec	Korean Air
25 Dec - 27 Dec	Jeju Air
20 Dec - 04 Jan	Jeju Air
16 Dec - 24 Dec	Korean Air
31 Dec - 04 Jan	Jeju Air
31 Dec - 02 Jan	Korean Air
29 Dec - 10 Jan	Spring Airlines Japan
25 Dec - 04 Jan	Zipair
24 Dec - 04 Jan	Jeju Air
29 Dec - 07 Jan	Air China
30 Dec - 09 Jan	Korean Air
24 Dec - 07 Jan	Korean Air
25 Dec - 10 Jan	Korean 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 309€

Return flights