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

Return flights

01 Dec - 08 Dec	Pegasus Airlines
01 Dec - 14 Dec	Ryanair
06 Dec - 12 Jan	Pegasus Airlines
01 Dec - 05 Dec	Pegasus Airlines
04 Dec - 18 Dec	Pegasus Airlines
06 Dec - 20 Dec	Pegasus Airlines
12 Dec - 19 Dec	Pegasus Airlines
11 Dec - 02 Jan	Pegasus Airlines
08 Dec - 27 Dec	Ryanair
30 Dec - 22 Jan	SunExpress
18 Dec - 02 Jan	Ryanair
27 Dec - 10 Jan	Pegasus Airlines
20 Dec - 01 Jan	Ryanair
12 Dec - 01 Jan	Pegasus Airlines
05 Dec - 04 Jan	Pegasus Airlines
01 Dec - 18 Dec	Emirates
07 Dec - 15 Dec	Emirates
08 Dec - 15 Dec	Emirates
21 Dec - 03 Jan	Pegasus Airlines
09 Dec - 15 Jan	Emirates

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 $698

Return flights