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

Return flights

13 Sep - 28 Sep	Wizz Air UK
15 Sep - 09 Oct	Wizz Air UK
12 Sep - 28 Sep	Wizz Air UK
13 Sep - 16 Sep	Wizz Air UK
24 Sep - 09 Oct	Wizz Air Malta
12 Sep - 16 Oct	Wizz Air UK
16 Sep - 16 Oct	Wizz Air Malta
13 Sep - 20 Sep	Saudia
22 Sep - 22 Oct	Ryanair
22 Sep - 05 Oct	Ryanair
22 Sep - 09 Oct	Wizz Air UK
13 Sep - 07 Oct	Wizz Air UK
15 Sep - 14 Oct	Wizz Air UK
11 Sep - 15 Oct	Wizz Air UK
16 Sep - 24 Sep	Wizz Air UK
13 Sep - 22 Sep	Wizz Air UK
13 Sep - 29 Sep	Saudia
13 Sep - 25 Sep	Wizz Air UK
21 Sep - 28 Sep	Wizz Air UK
15 Sep - 23 Sep	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 546€

Return flights