Cheapest return flights from Ulaanbaatar to Seoul in December from $246

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

Return flights

04 Dec - 11 Dec Jeju Air direct
11 Dec - 18 Dec Jeju Air direct
04 Dec - 09 Dec Jeju Air direct
10 Dec - 17 Dec Aero Mongolia direct
31 Dec - 07 Jan Aero Mongolia
11 Dec - 22 Dec Jeju Air direct
02 Dec - 07 Dec Jeju Air direct
31 Dec - 07 Jan Aero Mongolia direct
18 Dec - 25 Dec Aero Mongolia direct
16 Dec - 23 Dec Jeju Air direct
04 Dec - 12 Dec Korean Air direct
12 Dec - 11 Jan Korean Air direct
06 Dec - 07 Dec Korean Air direct
16 Dec - 20 Jan Jeju Air direct
30 Dec - 11 Jan Jeju Air direct
05 Dec - 05 Jan Korean Air direct
18 Dec - 22 Jan Jeju Air direct
25 Dec - 03 Jan Korean Air direct
31 Dec - 31 Jan Korean Air direct
12 Dec - 10 Jan Korean 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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