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

Return flights

02 Sep - 18 Sep	SriLankan Airlines
10 Sep - 18 Sep	SriLankan Airlines
10 Sep - 20 Sep	Cathay Pacific
03 Sep - 16 Sep	Cathay Pacific
08 Sep - 22 Sep	Cathay Pacific
03 Sep - 18 Sep	SriLankan Airlines
05 Sep - 11 Sep	Air India
01 Sep - 22 Sep	Air India
01 Sep - 15 Sep	Air India
02 Sep - 14 Oct	Air India
04 Sep - 30 Sep	Air India
01 Sep - 10 Oct	Air India
30 Sep - 21 Oct	Air India
10 Sep - 20 Oct	Cathay Pacific
29 Sep - 21 Oct	Air India
15 Sep - 08 Oct	Air India
12 Sep - 08 Oct	Air India
17 Sep - 18 Oct	Air India
12 Sep - 07 Oct	Air India
17 Sep - 17 Oct	Air India

Also check the deals for one-way flights from Melbourne 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 Melbourne to Kathmandu in September from $725

Return flights