Cheapest return flights from Seoul to Ulaanbaatar in December from 185€

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

Return flights

09 Dec - 11 Dec Jeju Air direct
31 Dec - 04 Jan Air China
07 Dec - 11 Dec Jeju Air direct
03 Dec - 09 Dec Asiana Airlines direct
04 Dec - 11 Dec Jeju Air direct
03 Dec - 07 Dec Asiana Airlines direct
03 Dec - 11 Dec Asiana Airlines direct
03 Dec - 14 Dec Asiana Airlines direct
06 Dec - 09 Dec Asiana Airlines direct
06 Dec - 11 Dec Asiana Airlines direct
06 Dec - 14 Dec Asiana Airlines direct
30 Dec - 26 Jan Air China
31 Dec - 07 Jan Air China
29 Dec - 04 Jan Air China
29 Dec - 26 Jan Air China
31 Dec - 26 Jan Air China
29 Dec - 19 Jan Air China
20 Dec - 01 Jan Asiana Airlines direct
24 Dec - 04 Jan Asiana Airlines direct
16 Dec - 01 Jan Jeju Air direct

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

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