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

Return flights

23 Jan - 30 Jan	Air China
22 Jan - 29 Jan	Air China
27 Jan - 29 Jan	Air China
21 Jan - 29 Jan	Air China
21 Jan - 28 Jan	Air China
09 Jan - 19 Jan	Air China
11 Jan - 19 Jan	Air China
16 Jan - 19 Jan	Air China
12 Jan - 19 Jan	Air China
16 Jan - 23 Jan	Air China
27 Jan - 03 Feb	Air China

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 $228

Return flights