Cheapest return flights from Bangkok to Ulaanbaatar in September from $510

Best time to book flights for Bangkok (BKK) to Ulaanbaatar (UBN) flights at AirHint

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

Return flights

23 Sep - 15 Oct Air China
17 Sep - 27 Sep Air China
25 Sep - 02 Oct Air China

Also check the deals for one-way flights from Bangkok 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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