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

Return flights

17 Oct - 24 Oct	HK Express
15 Oct - 22 Oct	Emirates
16 Oct - 23 Oct	T'way Air
16 Oct - 22 Oct	T'way Air
30 Oct - 06 Nov	Thai VietJet Air
23 Oct - 30 Oct	T'way Air
13 Oct - 20 Oct	HK Express
19 Oct - 26 Oct	T'way Air
18 Oct - 25 Oct	T'way Air
21 Oct - 28 Oct	T'way Air
23 Oct - 29 Oct	T'way Air
25 Oct - 01 Nov	T'way Air
26 Oct - 02 Nov	Thai VietJet Air
28 Oct - 04 Nov	Thai VietJet Air
27 Oct - 03 Nov	Shandong Airlines
29 Oct - 05 Nov	Air Busan
31 Oct - 07 Nov	Thai VietJet Air
25 Oct - 02 Nov	Air China

Also check the deals for one-way flights from Bangkok to Ulaanbaatar in October.

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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Cheapest return flights from Bangkok to Ulaanbaatar in October from 355€

Return flights