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

Return flights

03 Dec - 08 Dec	Malaysia Airlines
03 Dec - 30 Dec	Malaysia Airlines
24 Dec - 13 Jan	Indonesia AirAsia
29 Dec - 11 Jan	Singapore Airlines
11 Dec - 04 Jan	Qantas
12 Dec - 05 Jan	Qantas
18 Dec - 05 Jan	Singapore Airlines
19 Dec - 07 Jan	Cathay Pacific
19 Dec - 05 Jan	Singapore Airlines
22 Dec - 02 Jan	Thai Airways
01 Dec - 25 Jan	IndiGo

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 643€

Return flights