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 - 23 Aug	T'way Air
26 Aug - 31 Aug	T'way Air
19 Aug - 27 Aug	T'way Air
23 Aug - 27 Aug	T'way Air
08 Aug - 14 Aug	Jeju Air
10 Aug - 13 Aug	T'way Air
16 Aug - 20 Aug	T'way Air
16 Aug - 25 Aug	T'way Air
16 Aug - 22 Aug	T'way Air
16 Aug - 24 Aug	T'way Air
24 Aug - 02 Sep	Asiana Airlines
24 Aug - 03 Sep	Asiana Airlines
28 Aug - 01 Sep	Asiana Airlines
29 Aug - 01 Sep	Asiana Airlines
28 Aug - 02 Sep	Asiana Airlines
29 Aug - 03 Sep	Asiana Airlines
25 Aug - 02 Sep	Korean Air
30 Aug - 06 Sep	Korean Air
31 Aug - 08 Sep	Korean 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 $423

Return flights