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

Return flights

03 Sep - 02 Oct	Wizz Air UK
06 Sep - 25 Sep	Wizz Air UK
08 Sep - 21 Sep	Wizz Air UK
01 Sep - 25 Sep	Wizz Air UK
01 Sep - 15 Sep	Wizz Air UK
08 Sep - 24 Sep	Wizz Air
05 Sep - 17 Oct	Wizz Air UK
08 Sep - 10 Oct	Wizz Air UK
03 Sep - 03 Oct	Wizz Air UK
01 Sep - 30 Sep	Wizz Air UK
01 Sep - 03 Oct	Wizz Air UK
08 Sep - 15 Sep	Wizz Air UK
05 Sep - 28 Sep	Wizz Air UK
08 Sep - 29 Sep	Wizz Air UK
09 Sep - 25 Sep	Vueling Airlines
12 Sep - 02 Oct	Wizz Air UK
12 Sep - 03 Oct	Wizz Air UK
12 Sep - 16 Oct	Wizz Air UK
08 Sep - 06 Oct	Wizz Air UK
01 Sep - 01 Oct	Wizz Air UK

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 515€

Return flights