AirHint found the following cheapest return flights from Busan (PUS) to Ulaanbaatar (UBN) in January 2026 (see full year).

Return flights

22 Jan - 28 Jan	Air China
28 Jan - 31 Jan	T'way Air
05 Jan - 14 Jan	Eastar Jet
18 Jan - 27 Jan	Air China
31 Jan - 03 Feb	Korean Air
30 Jan - 02 Feb	Korean Air
28 Jan - 01 Feb	Korean Air
30 Jan - 01 Feb	Korean Air
14 Jan - 17 Jan	Air China
24 Jan - 26 Jan	Korean Air
25 Jan - 28 Jan	Korean Air
21 Jan - 23 Jan	Air China
24 Jan - 28 Jan	Korean Air
24 Jan - 30 Jan	Korean Air

Also check the deals for one-way flights from Busan to Ulaanbaatar in January.

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

Cheapest return flights from Busan to Ulaanbaatar in January from 262€

Return flights