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

Return flights

08 Dec - 17 Dec	AJet
13 Dec - 28 Dec	AJet
15 Dec - 29 Dec	AJet
13 Dec - 07 Jan	AJet
13 Dec - 27 Dec	AJet
13 Dec - 06 Jan	AJet
15 Dec - 05 Jan	AJet
11 Dec - 07 Jan	AJet
15 Dec - 07 Jan	AJet
17 Dec - 07 Jan	AJet
18 Dec - 14 Jan	SunExpress
21 Dec - 17 Jan	Pegasus Airlines
18 Dec - 12 Jan	SunExpress
27 Dec - 05 Jan	AJet
20 Dec - 27 Dec	SunExpress
13 Dec - 20 Dec	Emirates

Also check the deals for one-way flights from Zurich 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 Zurich to Kathmandu in December from 541€

Return flights