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

Return flights

01 Sep - 14 Sep	Qantas
28 Sep - 29 Oct	China Eastern
28 Sep - 31 Oct	China Eastern
05 Sep - 26 Sep	Qantas
15 Sep - 21 Sep	Qantas
15 Sep - 22 Sep	Qantas
23 Sep - 26 Oct	Jetstar
21 Sep - 28 Sep	Qantas
29 Sep - 30 Oct	VietJet Air
08 Sep - 24 Sep	Singapore Airlines
01 Sep - 08 Oct	Singapore Airlines
21 Sep - 17 Oct	Qantas
01 Sep - 07 Oct	Singapore Airlines
10 Sep - 30 Sep	Cathay Pacific
28 Sep - 30 Oct	IndiGo
27 Sep - 28 Oct	IndiGo
25 Sep - 30 Oct	IndiGo
09 Sep - 30 Sep	Qantas
19 Sep - 29 Sep	Qantas
15 Sep - 15 Sep	Emirates

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 658€

Return flights