Cheapest return flights from Seoul to Ulaanbaatar in August from $276

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

Return flights

30 Aug - 20 Sep Jeju Air direct
31 Aug - 10 Sep T'way Air direct
31 Aug - 07 Sep Jeju Air direct
28 Aug - 01 Sep Jeju Air direct
28 Aug - 02 Sep MIAT Mongolian Airlines direct
24 Aug - 01 Sep Jeju Air direct
31 Aug - 03 Sep T'way Air direct
28 Aug - 07 Sep Jeju Air direct
30 Aug - 04 Sep Jeju Air direct
31 Aug - 06 Sep Jeju Air direct
25 Aug - 29 Aug Asiana Airlines direct
26 Aug - 29 Aug Asiana Airlines direct
24 Aug - 30 Aug Jeju Air direct
28 Aug - 30 Aug Jeju Air direct
24 Aug - 27 Aug Asiana Airlines direct
25 Aug - 27 Aug Asiana Airlines direct
23 Aug - 29 Aug MIAT Mongolian Airlines direct
27 Aug - 29 Aug Asiana Airlines direct
08 Aug - 14 Aug Jeju Air direct
08 Aug - 16 Aug Jeju Air direct

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

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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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