Cheapest one-way flights from Seoul to Ulaanbaatar in September from $97

AirHint found the following cheapest one-way flights from Seoul (ICN) to Ulaanbaatar (UBN) in September 2025 (see full year).

One-Way flights

22 Sep Jeju Air direct
29 Sep T'way Air direct
02 Sep Jeju Air direct
14 Sep Jeju Air direct
28 Sep Jeju Air direct
21 Sep T'way Air direct
24 Sep T'way Air direct
26 Sep T'way Air direct
30 Sep Jeju Air direct
15 Sep Jeju Air direct

Also check the deals for return flights from Seoul to Ulaanbaatar in September.

Skyscanner

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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