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

Return flights

02 Dec - 31 Jan	Brussels Airlines
02 Dec - 12 Dec	Brussels Airlines
05 Dec - 12 Dec	Brussels Airlines
02 Dec - 09 Dec	Brussels Airlines
05 Dec - 24 Dec	Brussels Airlines
09 Dec - 19 Dec	SWISS
01 Dec - 07 Dec	Air India
29 Dec - 20 Jan	Turkish Airlines
02 Dec - 08 Dec	Air India
12 Dec - 16 Jan	Eurowings
03 Dec - 06 Dec	Eurowings
25 Dec - 26 Jan	Turkish Airlines
29 Dec - 16 Jan	Turkish Airlines
01 Dec - 19 Dec	Air India
01 Dec - 15 Dec	Air India
30 Dec - 31 Jan	Air India
28 Dec - 26 Jan	Air India
28 Dec - 24 Jan	Air India
27 Dec - 31 Jan	Air India
25 Dec - 18 Jan	Turkish 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.

Book a cheap hotel in Kathmandu

Cheap car rent in Kathmandu

Cheapest return flights from London to Kathmandu in December from $657

Return flights