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

Return flights

05 Dec - 16 Dec	Eurowings
26 Dec - 16 Jan	British Airways
01 Dec - 08 Dec	Lufthansa
05 Dec - 10 Jan	British Airways
01 Dec - 20 Dec	Virgin Atlantic
21 Dec - 30 Jan	Aegean Airlines
01 Dec - 15 Dec	Oman Air
05 Dec - 17 Jan	Kuwait Airways
07 Dec - 18 Jan	Kuwait Airways
01 Dec - 14 Dec	Air India
01 Dec - 18 Dec	Air India
04 Dec - 11 Dec	Air India
02 Dec - 23 Dec	Air India
11 Dec - 30 Jan	Eurowings
22 Dec - 25 Jan	Aegean Airlines
01 Dec - 16 Dec	Air India
01 Dec - 21 Dec	Air India
05 Dec - 13 Jan	Kuwait Airways
06 Dec - 12 Jan	British Airways
07 Dec - 06 Jan	Kuwait Airways

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 575€

Return flights