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

Return flights

01 Dec - 07 Dec	Air India
05 Dec - 20 Dec	Kuwait Airways
31 Dec - 28 Jan	British Airways
29 Dec - 29 Jan	British Airways
31 Dec - 26 Jan	Kuwait Airways
24 Dec - 16 Jan	LOT
13 Dec - 07 Jan	Eurowings
21 Dec - 16 Jan	Aegean Airlines
01 Dec - 15 Dec	British Airways
03 Dec - 26 Dec	Thai Airways
08 Dec - 22 Dec	Thai Airways
08 Dec - 24 Jan	Kuwait Airways
24 Dec - 19 Jan	Kuwait Airways
20 Dec - 23 Jan	Aegean Airlines
24 Dec - 24 Jan	British Airways
07 Dec - 15 Dec	SriLankan Airlines
01 Dec - 28 Dec	Thai Airways
08 Dec - 29 Dec	Thai Airways
06 Dec - 30 Dec	Thai Airways
03 Dec - 27 Dec	Thai Airways

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.

Book a cheap hotel in Kathmandu

Cheap car rent in Kathmandu

Cheapest return flights from London to Kathmandu in December from $781

Return flights