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

Return flights

30 Aug - 13 Sep	T'way Air
27 Aug - 06 Sep	Jeju Air
30 Aug - 03 Sep	T'way Air
30 Aug - 01 Sep	T'way Air
23 Aug - 27 Aug	T'way Air
29 Aug - 01 Sep	Jeju Air
09 Aug - 11 Aug	T'way Air
16 Aug - 26 Aug	Jeju Air
23 Aug - 25 Aug	T'way Air
09 Aug - 13 Aug	T'way Air
09 Aug - 20 Aug	T'way Air
16 Aug - 23 Aug	Air Busan
25 Aug - 28 Aug	Air China
13 Aug - 20 Aug	Air China
27 Aug - 03 Sep	Air China
08 Aug - 14 Aug	Jeju Air
30 Aug - 06 Sep	Air China
29 Aug - 04 Sep	Air China
06 Aug - 18 Sep	Air China
20 Aug - 06 Sep	Air China

Also check the deals for one-way flights from Osaka to Ulaanbaatar in August.

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 August from 248€

Return flights