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

Return flights

02 Dec - 16 Dec	Pegasus Airlines
01 Dec - 12 Jan	Pegasus Airlines
01 Dec - 14 Jan	Ryanair
09 Dec - 02 Jan	Ryanair
08 Dec - 21 Jan	Ryanair
08 Dec - 15 Dec	Ryanair
27 Dec - 19 Jan	SunExpress
30 Dec - 31 Jan	Ryanair
31 Dec - 30 Jan	Ryanair
05 Dec - 09 Jan	Ryanair
11 Dec - 12 Jan	Pegasus Airlines
07 Dec - 07 Jan	Pegasus Airlines
01 Dec - 18 Dec	Ryanair
03 Dec - 28 Dec	Pegasus Airlines
01 Dec - 31 Dec	Ryanair
22 Dec - 28 Dec	Ryanair
13 Dec - 28 Dec	easyJet
01 Dec - 29 Dec	Ryanair
01 Dec - 26 Dec	Pegasus Airlines
06 Dec - 31 Dec	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 560€

Return flights