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

Return flights

15 Oct - 22 Oct	Thai Lion Air
18 Oct - 25 Oct	Thai AirAsia
17 Oct - 24 Oct	Thai AirAsia
13 Oct - 20 Oct	Thai AirAsia
14 Oct - 21 Oct	Thai AirAsia
19 Oct - 26 Oct	Thai AirAsia
21 Oct - 28 Oct	Thai AirAsia
20 Oct - 27 Oct	Thai AirAsia
22 Oct - 29 Oct	Thai AirAsia
11 Oct - 18 Oct	Thai Lion Air
25 Oct - 01 Nov	Thai Lion Air
30 Oct - 06 Nov	Thai AirAsia X
27 Oct - 03 Nov	Thai AirAsia
29 Oct - 05 Nov	Thai AirAsia X
28 Oct - 04 Nov	Thai Lion Air
31 Oct - 07 Nov	Thai AirAsia X
26 Oct - 02 Nov	Thai AirAsia X

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 $457

Return flights