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

Return flights

06 Dec - 20 Dec	SWISS
13 Dec - 01 Jan	SWISS
09 Dec - 07 Jan	SWISS
09 Dec - 15 Jan	British Airways
05 Dec - 04 Jan	Lufthansa
16 Dec - 06 Jan	SWISS
08 Dec - 23 Dec	Lufthansa
16 Dec - 08 Jan	SWISS
11 Dec - 02 Jan	Lufthansa
16 Dec - 30 Dec	British Airways
15 Dec - 06 Jan	Lufthansa
17 Dec - 08 Jan	SWISS
16 Dec - 09 Jan	British Airways
22 Dec - 30 Dec	KLM
18 Dec - 31 Dec	KLM

Also check the deals for one-way flights from London 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 London to Kathmandu in December from $2067

Return flights