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

Return flights

08 Jun - 11 Jun	Asiana Airlines	direct
15 Jun - 19 Jun	Korean Air	direct
24 Jun - 28 Jun	Asiana Airlines	direct
21 Jun - 26 Jun	Korean Air	direct
28 Jun - 03 Jul	Korean Air	direct
28 Jun - 28 Jun	Korean Air	direct

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

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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Cheapest return flights from Seoul to Ulaanbaatar in June from 353€

Return flights