Cheapest return flights from Seoul to Ulaanbaatar in September from 238€

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

Return flights

18 Sep - 28 Sep Aero Mongolia direct
17 Sep - 22 Sep MIAT Mongolian Airlines direct
20 Sep - 24 Sep Jeju Air direct
17 Sep - 20 Sep Korean Air direct
11 Sep - 16 Sep Korean Air direct
20 Sep - 23 Sep Korean Air direct
20 Sep - 25 Sep Korean Air direct
18 Sep - 23 Sep Korean Air direct
30 Sep - 10 Oct Korean Air direct
02 Sep - 06 Sep Asiana Airlines direct
02 Sep - 07 Sep Korean Air direct

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

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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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