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

Return flights

07 Dec - 09 Jan	SWISS
02 Dec - 23 Dec	SWISS
02 Dec - 16 Dec	SWISS
07 Dec - 27 Dec	SWISS
13 Dec - 20 Dec	Eurowings
01 Dec - 08 Dec	Air India
18 Dec - 25 Dec	KLM
05 Dec - 27 Dec	Kuwait Airways
31 Dec - 20 Jan	SWISS
17 Dec - 16 Jan	LOT
26 Dec - 09 Jan	Turkish Airlines
31 Dec - 27 Jan	Qatar Airways
08 Dec - 24 Jan	Oman Air
10 Dec - 24 Dec	Kuwait Airways
08 Dec - 07 Jan	Turkish Airlines
12 Dec - 12 Jan	Eurowings
08 Dec - 23 Jan	Oman Air
08 Dec - 21 Jan	Oman Air
08 Dec - 20 Dec	Oman Air
01 Dec - 13 Dec	Oman Air

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 562€

Return flights