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

Return flights

11 Sep - 11 Oct	Jetstar
30 Sep - 20 Oct	SriLankan Airlines
11 Sep - 05 Oct	China Eastern
30 Sep - 22 Oct	SriLankan Airlines
20 Sep - 20 Oct	SriLankan Airlines
30 Sep - 21 Oct	Qantas
13 Sep - 03 Oct	VietJet Air
28 Sep - 20 Oct	SriLankan Airlines
27 Sep - 20 Oct	SriLankan Airlines
30 Sep - 19 Oct	SriLankan Airlines
14 Sep - 27 Sep	Air India
14 Sep - 28 Sep	Air India
15 Sep - 27 Sep	China Southern
12 Sep - 19 Sep	Thai Airways
19 Sep - 20 Sep	Air India
12 Sep - 20 Sep	China Southern
19 Sep - 22 Sep	China Southern
22 Sep - 28 Sep	Qantas

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 $930

Return flights