Cheapest return flights from Seoul to Ulaanbaatar in December from 443€

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

Return flights

21 Dec - 30 Dec Air China
14 Dec - 18 Dec Air China
29 Dec - 09 Jan Air China
07 Dec - 11 Dec Air China
10 Dec - 13 Dec Air China
03 Dec - 08 Dec Air China
01 Dec - 24 Dec Air China
12 Dec - 14 Dec Air China
31 Dec - 04 Jan Air China
31 Dec - 08 Jan Air China
14 Dec - 17 Dec Air China
21 Dec - 25 Dec Air China
24 Dec - 28 Dec Air China

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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