Cheapest return flights from Seoul to Ulaanbaatar in September from 357€

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

Return flights

02 Sep - 12 Sep Asiana Airlines direct
17 Sep - 20 Sep Korean Air direct
25 Sep - 02 Oct Korean Air direct
07 Sep - 11 Sep Korean Air direct
09 Sep - 11 Sep Korean Air direct
21 Sep - 26 Sep Korean Air direct
02 Sep - 07 Sep Korean Air direct
10 Sep - 13 Sep Korean Air direct
19 Sep - 26 Sep Korean Air direct
27 Sep - 04 Oct Korean Air direct
22 Sep - 27 Sep Asiana Airlines direct
25 Sep - 28 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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