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

Return flights

07 Sep - 14 Sep	China Southern
05 Sep - 12 Sep	China Southern
01 Sep - 17 Sep	Jetstar
16 Sep - 23 Sep	Jetstar
01 Sep - 15 Sep	China Southern
14 Sep - 21 Sep	Qantas
26 Sep - 03 Oct	VietJet Air
29 Sep - 14 Oct	VietJet Air
26 Sep - 25 Oct	Jetstar
29 Sep - 06 Oct	China Southern
03 Sep - 29 Sep	IndiGo
12 Sep - 26 Sep	IndiGo
12 Sep - 26 Oct	Qantas
26 Sep - 27 Oct	IndiGo
04 Sep - 15 Sep	Qantas
21 Sep - 29 Oct	IndiGo
20 Sep - 30 Oct	IndiGo
08 Sep - 28 Sep	China Southern
28 Sep - 12 Oct	IndiGo
25 Sep - 25 Oct	IndiGo

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 556€

Return flights