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

Return flights

11 Sep - 18 Sep	Air China
19 Sep - 03 Oct	Air China
16 Sep - 03 Oct	Air China
14 Sep - 24 Sep	Air China
23 Sep - 03 Oct	Air China
10 Sep - 22 Sep	Ryanair
14 Sep - 28 Sep	Air China
09 Sep - 22 Sep	Ryanair
13 Sep - 23 Sep	Norwegian
16 Sep - 29 Sep	Air China
08 Sep - 22 Sep	Air China
16 Sep - 28 Oct	Turkish Airlines
17 Sep - 28 Oct	Turkish Airlines
16 Sep - 30 Oct	Turkish Airlines
17 Sep - 30 Oct	Turkish Airlines
10 Sep - 17 Sep	Ryanair
28 Sep - 22 Oct	Lufthansa
13 Sep - 25 Sep	Norwegian
16 Sep - 31 Oct	Air China
16 Sep - 29 Oct	Air China

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

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 Stockholm to Ulaanbaatar in September from $553

Return flights