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

Return flights

03 Dec - 31 Dec	Jetstar
13 Dec - 22 Jan	Indonesia AirAsia
18 Dec - 22 Jan	Jetstar
15 Dec - 15 Jan	Indonesia AirAsia
13 Dec - 23 Jan	Indonesia AirAsia
20 Dec - 17 Jan	Indonesia AirAsia
28 Dec - 28 Jan	Cathay Pacific
19 Dec - 16 Jan	Jetstar
12 Dec - 11 Jan	Singapore Airlines
15 Dec - 16 Jan	Singapore Airlines
20 Dec - 26 Dec	Singapore Airlines
09 Dec - 03 Jan	Emirates

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 $992

Return flights