Cheapest return flights from Seoul to Ulaanbaatar in December from 234€

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

Return flights

30 Dec - 20 Jan Air China
31 Dec - 22 Jan Asiana Airlines direct
30 Dec - 20 Jan Jeju Air direct
30 Dec - 27 Jan Jeju Air direct
23 Dec - 18 Jan Jeju Air direct
22 Dec - 22 Jan Korean Air direct
28 Dec - 15 Jan Jeju Air direct
25 Dec - 01 Jan Aero Mongolia direct
25 Dec - 03 Jan Aero Mongolia direct
31 Dec - 24 Jan Korean Air direct
22 Dec - 31 Dec Korean Air direct
29 Dec - 31 Dec Korean Air direct
28 Dec - 31 Dec Korean Air direct
25 Dec - 31 Dec Korean Air direct
26 Dec - 31 Dec Korean Air direct
22 Dec - 26 Dec Korean Air direct
22 Dec - 28 Dec Korean Air direct
25 Dec - 28 Dec MIAT Mongolian Airlines direct
25 Dec - 29 Dec Korean Air direct
26 Dec - 29 Dec Korean Air direct

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

Powered by

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.