Cheapest return flights from Seoul to Ulaanbaatar in August from $262

Best time to book flights for Seoul (ICN) to Ulaanbaatar (UBN) flights at AirHint

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

Return flights

31 Aug - 04 Sep Jeju Air direct
31 Aug - 05 Sep T'way Air direct
31 Aug - 08 Sep Jeju Air direct
28 Aug - 01 Sep Jeju Air direct
29 Aug - 03 Sep T'way Air direct
27 Aug - 03 Sep T'way Air direct
26 Aug - 09 Sep Jeju Air direct
30 Aug - 04 Sep Jeju Air direct
30 Aug - 07 Sep Jeju Air direct
31 Aug - 06 Sep Jeju Air direct
27 Aug - 29 Aug T'way Air direct
27 Aug - 31 Aug T'way Air direct
24 Aug - 29 Aug T'way Air direct
25 Aug - 29 Aug T'way Air direct
25 Aug - 31 Aug T'way Air direct
24 Aug - 27 Aug T'way Air direct
25 Aug - 28 Aug Jeju Air direct
28 Aug - 31 Aug Jeju Air direct
18 Aug - 27 Aug T'way Air direct
18 Aug - 22 Aug T'way 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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