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

Return flights

30 Aug - 03 Sep	T'way Air
19 Aug - 22 Aug	Air China
18 Aug - 21 Aug	Air China
23 Aug - 26 Aug	Air China
21 Aug - 26 Aug	Air China
23 Aug - 27 Aug	Air China
15 Aug - 21 Aug	Air China
18 Aug - 28 Aug	Air China
18 Aug - 31 Aug	Air China
20 Aug - 25 Aug	Air China
27 Aug - 03 Sep	Air China
27 Aug - 30 Aug	Air China
20 Aug - 03 Sep	Air China
18 Aug - 02 Sep	Jin Air
18 Aug - 05 Sep	Jin Air
24 Aug - 02 Sep	Jin Air
24 Aug - 05 Sep	Jin Air
24 Aug - 09 Sep	Jin Air
17 Aug - 02 Sep	Jin Air
17 Aug - 05 Sep	Jin Air

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 321€

Return flights