AirHint found the following cheapest return flights from Seoul (ICN) to Ulaanbaatar (UBN) in August 2026 (see full year).

Return flights

26 Aug - 30 Aug	Asiana Airlines	direct
10 Aug - 15 Aug	Asiana Airlines	direct
08 Aug - 15 Aug	Asiana Airlines	direct
04 Aug - 13 Aug	Asiana Airlines	direct
19 Aug - 23 Aug	Asiana Airlines	direct
12 Aug - 17 Aug	Air China
10 Aug - 17 Aug	Air China
17 Aug - 21 Aug	Air China
13 Aug - 19 Aug	Korean Air	direct
14 Aug - 21 Aug	Air China

Also check the deals for one-way flights from Seoul 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 Seoul to Ulaanbaatar in August from 313€

Return flights