Cheapest return flights from Busan to Ulaanbaatar in September from $261

Best time to book flights for Busan (PUS) to Ulaanbaatar (UBN) flights at AirHint

AirHint found the following cheapest return flights from Busan (PUS) to Ulaanbaatar (UBN) in September 2025 (see full year).

Return flights

14 Sep - 19 Sep Jeju Air direct
18 Sep - 21 Sep Jeju Air direct
03 Sep - 07 Sep Jeju Air direct
25 Sep - 13 Oct Jin Air direct
06 Sep - 13 Sep MIAT Mongolian Airlines
22 Sep - 27 Sep Korean Air
23 Sep - 28 Sep Korean Air

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

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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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