Cheapest return flights from Seoul to Ulaanbaatar in August from $278

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

Return flights

13 Aug - 17 Aug Aero Mongolia direct
19 Aug - 25 Aug Aero Mongolia direct
09 Aug - 18 Aug Aero Mongolia direct
14 Aug - 18 Aug Aero Mongolia direct
14 Aug - 17 Aug Aero Mongolia direct
27 Aug - 01 Sep Jeju Air direct
23 Aug - 29 Aug Jeju Air direct
18 Aug - 20 Aug Jeju Air direct
25 Aug - 29 Aug Jeju Air direct
28 Aug - 02 Sep Asiana Airlines direct
26 Aug - 02 Sep Asiana Airlines direct
26 Aug - 03 Sep Asiana Airlines direct
17 Aug - 24 Aug Jeju Air direct
18 Aug - 23 Aug Jeju Air direct

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

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