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

Return flights

08 Dec - 24 Dec	Pegasus Airlines
01 Dec - 11 Dec	Ryanair
07 Dec - 09 Jan	Ryanair
04 Dec - 18 Dec	Ryanair
07 Dec - 08 Jan	Ryanair
01 Dec - 14 Dec	Ryanair
04 Dec - 26 Dec	Ryanair
15 Dec - 08 Jan	Ryanair
15 Dec - 10 Jan	Ryanair
03 Dec - 08 Jan	Ryanair
15 Dec - 26 Dec	Ryanair
08 Dec - 19 Dec	Ryanair
05 Dec - 23 Jan	Ryanair
12 Dec - 22 Jan	Ryanair
16 Dec - 13 Jan	Ryanair
07 Dec - 31 Dec	Ryanair
10 Dec - 05 Jan	Pegasus Airlines
13 Dec - 09 Jan	Ryanair
12 Dec - 30 Dec	Ryanair
12 Dec - 26 Dec	Ryanair

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 573€

Return flights