AirHint found the following cheapest return flights from Brisbane (BNE) to Kathmandu (KTM) in September 2025 (see full year).

Return flights

11 Sep - 23 Oct	China Southern
16 Sep - 29 Oct	Jetstar
17 Sep - 21 Oct	Virgin Australia
10 Sep - 08 Oct	VietJet Air
10 Sep - 07 Oct	VietJet Air
16 Sep - 08 Oct	Jetstar
24 Sep - 29 Oct	China Southern
29 Sep - 21 Oct	VietJet Air
29 Sep - 14 Oct	VietJet Air
13 Sep - 27 Sep	Virgin Australia
29 Sep - 15 Oct	VietJet Air
11 Sep - 26 Sep	China Southern
19 Sep - 30 Sep	China Southern
15 Sep - 25 Sep	China Southern
12 Sep - 18 Sep	China Southern
12 Sep - 21 Sep	China Southern
13 Sep - 20 Sep	China Southern
12 Sep - 19 Sep	China Southern
15 Sep - 30 Sep	China Southern
18 Sep - 24 Sep	China Southern

Also check the deals for one-way flights from Brisbane to Kathmandu 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 Brisbane to Kathmandu in September from $773

Return flights