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

Return flights

08 Jun - 12 Jun	Korean Air	direct
22 Jun - 30 Jun	Asiana Airlines	direct
22 Jun - 27 Jun	Asiana Airlines	direct
16 Jun - 24 Jun	Asiana Airlines	direct
26 Jun - 01 Jul	Asiana Airlines	direct
22 Jun - 29 Jun	Air China
29 Jun - 03 Jul	Air China
25 Jun - 27 Jun	Korean Air	direct
22 Jun - 29 Jun	Korean Air	direct
29 Jun - 03 Jul	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 $441

Return flights