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

Return flights

03 Sep - 24 Sep	Wizz Air UK
16 Sep - 14 Oct	Wizz Air
15 Sep - 16 Oct	Wizz Air UK
15 Sep - 15 Oct	Wizz Air UK
21 Sep - 07 Oct	Wizz Air
08 Sep - 25 Sep	Wizz Air
14 Sep - 29 Sep	Wizz Air
03 Sep - 19 Sep	Wizz Air UK
18 Sep - 07 Oct	Wizz Air UK
25 Sep - 13 Oct	Wizz Air UK
03 Sep - 17 Sep	Wizz Air UK
22 Sep - 10 Oct	Wizz Air UK
22 Sep - 12 Oct	Wizz Air UK
24 Sep - 03 Oct	Wizz Air UK
12 Sep - 01 Oct	Wizz Air UK
19 Sep - 26 Sep	Wizz Air UK
02 Sep - 10 Sep	Wizz Air UK
08 Sep - 26 Sep	Wizz Air
08 Sep - 18 Sep	Wizz Air
03 Sep - 15 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 $620

Return flights