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

Return flights

10 Sep - 22 Sep	Wizz Air UK
08 Sep - 16 Sep	Wizz Air UK
05 Sep - 22 Sep	Wizz Air UK
13 Sep - 23 Sep	Wizz Air Malta
09 Sep - 11 Oct	Wizz Air UK
17 Sep - 09 Oct	Wizz Air Malta
15 Sep - 14 Oct	Wizz Air UK
07 Sep - 24 Sep	Wizz Air UK
17 Sep - 28 Sep	Wizz Air Malta
04 Sep - 21 Sep	Wizz Air UK
07 Sep - 29 Sep	Wizz Air UK
11 Sep - 05 Oct	Wizz Air Malta
08 Sep - 30 Sep	Wizz Air UK
18 Sep - 05 Oct	Wizz Air Malta
08 Sep - 29 Sep	Wizz Air UK
09 Sep - 05 Oct	Wizz Air UK
19 Sep - 17 Oct	Wizz Air Malta
21 Sep - 29 Oct	Wizz Air UK
24 Sep - 02 Oct	Vueling Airlines
16 Sep - 13 Oct	Wizz Air Malta

Also check the deals for one-way flights from London to Kathmandu in September.

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 September from $618

Return flights