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

Return flights

27 Jan - 04 Feb	Air China
27 Jan - 24 Feb	Air China
27 Jan - 05 Feb	Air China
27 Jan - 01 Feb	Air China
27 Jan - 28 Jan	Air China
30 Jan - 01 Feb	Air China
27 Jan - 11 Feb	Air China
28 Jan - 01 Feb	Air China
27 Jan - 07 Feb	Air China
27 Jan - 08 Feb	Air China
29 Jan - 05 Feb	Jeju Air	direct
28 Jan - 30 Jan	Korean Air	direct
29 Jan - 31 Jan	Korean Air	direct
26 Jan - 29 Jan	Asiana Airlines	direct
21 Jan - 28 Jan	Air China
21 Jan - 27 Jan	Air China
28 Jan - 31 Jan	Korean Air	direct
26 Jan - 28 Jan	Korean Air	direct
26 Jan - 30 Jan	Korean Air	direct
20 Jan - 22 Jan	Jeju Air	direct

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

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 January from 210€

Return flights