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

Return flights

03 Sep - 15 Sep	Wizz Air UK
01 Sep - 25 Sep	Wizz Air UK
07 Sep - 23 Sep	Wizz Air UK
04 Sep - 25 Sep	Wizz Air UK
07 Sep - 21 Sep	Wizz Air UK
01 Sep - 02 Oct	Wizz Air UK
01 Sep - 21 Sep	Wizz Air
03 Sep - 18 Sep	Wizz Air UK
01 Sep - 13 Sep	Wizz Air
11 Sep - 21 Sep	Wizz Air UK
10 Sep - 16 Sep	Wizz Air UK
15 Sep - 12 Oct	Wizz Air UK
05 Sep - 02 Oct	Wizz Air UK
10 Sep - 08 Oct	Wizz Air UK
03 Sep - 02 Oct	Wizz Air UK
12 Sep - 10 Oct	Wizz Air UK
02 Sep - 17 Oct	Wizz Air Malta
10 Sep - 10 Oct	Wizz Air UK
15 Sep - 19 Oct	Wizz Air UK
16 Sep - 28 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 542€

Return flights