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

Return flights

04 Dec - 23 Jan	Ryanair
04 Dec - 09 Dec	Pegasus Airlines
04 Dec - 11 Dec	Pegasus Airlines
11 Dec - 14 Dec	Ryanair
07 Dec - 14 Dec	Jet2
11 Dec - 19 Dec	Ryanair
02 Dec - 21 Dec	Ryanair
02 Dec - 09 Dec	Ryanair
07 Dec - 19 Dec	Jet2
07 Dec - 22 Dec	Jet2
02 Dec - 19 Dec	Ryanair
11 Dec - 29 Jan	Ryanair
29 Dec - 23 Jan	Pegasus Airlines
11 Dec - 30 Jan	Ryanair
05 Dec - 23 Jan	Pegasus Airlines
10 Dec - 29 Jan	Ryanair
05 Dec - 24 Jan	Pegasus Airlines
03 Dec - 24 Jan	Ryanair
15 Dec - 23 Jan	Ryanair
29 Dec - 28 Jan	Pegasus Airlines

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 417€

Return flights