Cheapest return flights from Seoul to Ulaanbaatar in December from 181€

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

Return flights

18 Dec - 25 Dec Jeju Air direct
02 Dec - 11 Dec Jeju Air direct
21 Dec - 25 Dec Jeju Air direct
14 Dec - 18 Dec Jeju Air direct
02 Dec - 09 Dec Jeju Air direct
23 Dec - 13 Jan Jeju Air direct
06 Dec - 09 Dec Asiana Airlines direct
20 Dec - 23 Dec Asiana Airlines direct
24 Dec - 28 Dec Asiana Airlines direct
01 Dec - 05 Dec Korean Air direct
29 Dec - 31 Dec Korean Air direct
29 Dec - 02 Jan Korean Air direct
24 Dec - 03 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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