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

Return flights

03 Dec - 17 Dec	Virgin Australia
03 Dec - 19 Dec	Jetstar
03 Dec - 20 Dec	Virgin Australia
02 Dec - 17 Dec	Jetstar
02 Dec - 07 Dec	Indonesia AirAsia
02 Dec - 18 Dec	Indonesia AirAsia
02 Dec - 21 Dec	Indonesia AirAsia
02 Dec - 20 Dec	Jetstar
02 Dec - 19 Dec	Jetstar
10 Dec - 31 Dec	Jetstar
30 Dec - 12 Jan	Qantas
11 Dec - 14 Jan	Jetstar
30 Dec - 13 Jan	Jetstar
29 Dec - 13 Jan	Jetstar
29 Dec - 12 Jan	Jetstar
23 Dec - 11 Jan	Jetstar
23 Dec - 10 Jan	Indonesia AirAsia
22 Dec - 09 Jan	Jetstar
21 Dec - 08 Jan	Jetstar
23 Dec - 07 Jan	Indonesia AirAsia

Also check the deals for one-way flights from Adelaide 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 Adelaide to Kathmandu in December from $923

Return flights