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

Return flights

31 Dec - 31 Jan	Pegasus Airlines
31 Dec - 29 Jan	Pegasus Airlines
31 Dec - 30 Jan	Pegasus Airlines
31 Dec - 23 Jan	AJet
29 Dec - 24 Jan	Pegasus Airlines
31 Dec - 19 Jan	Pegasus Airlines
29 Dec - 26 Jan	Pegasus Airlines
31 Dec - 13 Jan	Pegasus Airlines
30 Dec - 23 Jan	easyJet
30 Dec - 18 Jan	AJet
25 Dec - 29 Dec	Pegasus Airlines
22 Dec - 29 Dec	Air Serbia
24 Dec - 27 Dec	Jet2
24 Dec - 31 Dec	Ryanair
22 Dec - 30 Dec	Wizz Air UK
21 Dec - 25 Dec	Air India
23 Dec - 25 Dec	Pegasus Airlines
23 Dec - 30 Dec	Ryanair
21 Dec - 27 Dec	IndiGo
22 Dec - 27 Dec	IndiGo

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 462€

Return flights