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

Return flights

12 Aug - 19 Aug	Asiana Airlines	direct
01 Aug - 05 Aug	Asiana Airlines	direct
01 Aug - 08 Aug	Asiana Airlines	direct
01 Aug - 06 Aug	Asiana Airlines	direct
01 Aug - 09 Aug	Asiana Airlines	direct
12 Aug - 17 Aug	Air China
03 Aug - 07 Aug	Air China
14 Aug - 17 Aug	Air China
09 Aug - 14 Aug	Korean Air	direct
08 Aug - 16 Aug	Asiana Airlines	direct

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 $502

Return flights