Cheapest return flights from Seoul to Ulaanbaatar in December from 186€

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

Return flights

31 Dec - 04 Jan Asiana Airlines direct
16 Dec - 18 Dec Jeju Air direct
07 Dec - 09 Dec Jeju Air direct
07 Dec - 11 Dec Jeju Air direct
18 Dec - 15 Jan Jeju Air direct
14 Dec - 18 Dec Jeju Air direct
09 Dec - 11 Dec Jeju Air direct
31 Dec - 06 Jan Asiana Airlines direct
29 Dec - 08 Jan Asiana Airlines direct
04 Dec - 09 Dec Jeju Air direct
14 Dec - 16 Dec Jeju Air direct
04 Dec - 07 Dec Jeju Air direct
04 Dec - 11 Dec Jeju Air direct
12 Dec - 15 Dec Air China
30 Dec - 06 Jan Jeju Air direct
28 Dec - 06 Jan Jeju Air direct
28 Dec - 20 Jan Jeju Air direct
18 Dec - 14 Jan Air China
18 Dec - 01 Jan Jeju Air direct
11 Dec - 11 Jan Jeju Air direct

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

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