Cheapest return flights from Seoul to Ulaanbaatar in December from 268€

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

Return flights

21 Dec - 24 Dec Jeju Air direct
21 Dec - 28 Dec Jeju Air direct
13 Dec - 16 Dec Asiana Airlines direct
01 Dec - 07 Dec Asiana Airlines direct
24 Dec - 11 Jan Asiana Airlines direct
26 Dec - 29 Dec Korean Air direct
08 Dec - 15 Dec Korean Air direct
12 Dec - 21 Dec Korean Air direct
18 Dec - 20 Dec Korean Air direct
25 Dec - 28 Dec Korean Air direct
01 Dec - 06 Dec Korean Air direct
29 Dec - 02 Jan Korean Air direct
31 Dec - 03 Jan Korean Air direct
24 Dec - 02 Jan Korean Air direct

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

Skyscanner

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.

Book a cheap hotel in Ulaanbaatar

Cheap car rent in Ulaanbaatar

Feel free to contact us with any feedback or request another flight research.