AirHint found the following cheapest return flights from Perth (PER) to Kathmandu (KTM) in August 2025 (see full year).

Return flights

10 Aug - 17 Aug	AirAsia
05 Aug - 11 Aug	AirAsia
17 Aug - 09 Sep	AirAsia
11 Aug - 27 Aug	Malaysia Airlines
04 Aug - 22 Aug	Malaysia Airlines
19 Aug - 02 Sep	Malaysia Airlines
12 Aug - 29 Aug	Malaysia Airlines
17 Aug - 22 Aug	Malaysia Airlines
01 Aug - 29 Aug	Singapore Airlines
03 Aug - 17 Aug	Singapore Airlines
02 Aug - 17 Aug	Singapore Airlines
18 Aug - 25 Aug	Singapore Airlines
18 Aug - 01 Sep	Singapore Airlines
21 Aug - 07 Sep	Malaysia Airlines

Also check the deals for one-way flights from Perth to Kathmandu in August.

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 Perth to Kathmandu in August from $420

Return flights