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

Return flights

16 Dec - 21 Dec	Air China
13 Dec - 16 Dec	Asiana Airlines
05 Dec - 09 Dec	Air China
12 Dec - 19 Dec	Air China
12 Dec - 26 Dec	Air China
21 Dec - 24 Dec	Air China
17 Dec - 24 Dec	Air China
05 Dec - 08 Dec	Korean Air
13 Dec - 15 Dec	Korean Air
31 Dec - 04 Jan	Asiana Airlines
24 Dec - 30 Dec	Jeju Air
31 Dec - 07 Jan	Air China
30 Dec - 02 Jan	Korean Air
28 Dec - 03 Jan	Air China
27 Dec - 03 Jan	Air China
28 Dec - 02 Jan	Air China

Also check the deals for one-way flights from Osaka 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 Osaka to Ulaanbaatar in December from 344€

Return flights