Cheapest return flights from Ulaanbaatar to Seoul in December from 286€

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

Return flights

07 Dec - 09 Dec Jeju Air direct
18 Dec - 01 Jan Jeju Air direct
16 Dec - 23 Dec Jeju Air direct
11 Dec - 17 Dec Korean Air direct
11 Dec - 19 Dec Korean Air direct
11 Dec - 24 Dec Korean Air direct
18 Dec - 20 Jan Jeju Air direct
18 Dec - 25 Dec Jeju Air direct
09 Dec - 24 Dec Asiana Airlines direct
16 Dec - 22 Jan Jeju Air direct
08 Dec - 18 Dec Korean Air direct
31 Dec - 05 Jan MIAT Mongolian Airlines direct
21 Dec - 04 Jan Jeju Air direct
17 Dec - 27 Dec MIAT Mongolian Airlines direct
12 Dec - 17 Dec Korean Air direct
12 Dec - 03 Jan Korean Air direct
14 Dec - 03 Jan Korean Air direct
18 Dec - 02 Jan Korean Air direct
16 Dec - 25 Jan Jeju Air direct
23 Dec - 25 Jan Jeju Air direct

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