Cheapest return flights from Seoul to Ulaanbaatar in December from 147€

AirHint found the following cheapest return flights from Seoul (ICN) to Ulaanbaatar (UBN) in December 2025 (see full year).

Return flights

02 Dec - 11 Dec Jeju Air direct
09 Dec - 11 Dec Jeju Air direct
04 Dec - 11 Dec Jeju Air direct
07 Dec - 11 Dec Jeju Air direct
02 Dec - 16 Dec Jeju Air direct
09 Dec - 16 Dec Jeju Air direct
02 Dec - 07 Dec Jeju Air direct
02 Dec - 09 Dec Jeju Air direct
02 Dec - 14 Dec Jeju Air direct
04 Dec - 16 Dec Jeju Air direct
30 Dec - 08 Jan Jeju Air direct
29 Dec - 05 Jan Air China
20 Dec - 29 Jan Asiana Airlines direct
30 Dec - 04 Jan Jeju Air direct
28 Dec - 04 Jan Jeju Air direct
22 Dec - 01 Jan Asiana Airlines direct
28 Dec - 03 Jan Korean Air direct
29 Dec - 01 Jan Korean Air direct
31 Dec - 08 Jan Korean Air direct
26 Dec - 08 Jan Korean Air direct

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

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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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