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

Return flights

01 Dec - 10 Dec	Singapore Airlines
01 Dec - 08 Dec	Thai Airways
01 Dec - 15 Dec	Thai Airways
05 Dec - 12 Dec	Cathay Pacific
07 Dec - 22 Dec	Malaysia Airlines
01 Dec - 01 Dec	Malaysia Airlines
06 Dec - 22 Dec	Cathay Pacific
05 Dec - 30 Dec	Cathay Pacific
06 Dec - 20 Dec	Cathay Pacific
10 Dec - 20 Jan	Singapore Airlines
09 Dec - 23 Dec	Malaysia Airlines
09 Dec - 07 Jan	Singapore Airlines
13 Dec - 17 Jan	China Southern
14 Dec - 16 Jan	China Southern
11 Dec - 04 Jan	China Southern
11 Dec - 05 Jan	Singapore Airlines
18 Dec - 01 Jan	Qantas
08 Dec - 14 Jan	IndiGo
27 Dec - 11 Jan	China Southern
17 Dec - 07 Jan	Malaysia Airlines

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

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 December from $753

Return flights