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

Return flights

08 Sep - 22 Oct	Wizz Air
08 Sep - 14 Oct	Wizz Air
07 Sep - 25 Sep	Wizz Air UK
05 Sep - 29 Sep	Wizz Air UK
08 Sep - 07 Oct	Wizz Air
06 Sep - 20 Sep	Wizz Air UK
07 Sep - 24 Oct	Wizz Air UK
07 Sep - 16 Oct	Wizz Air UK
08 Sep - 27 Sep	Wizz Air
07 Sep - 27 Sep	Wizz Air UK
08 Sep - 10 Oct	Wizz Air
22 Sep - 22 Oct	Wizz Air UK
23 Sep - 14 Oct	Wizz Air UK
10 Sep - 29 Sep	Wizz Air
05 Sep - 20 Sep	Wizz Air UK
08 Sep - 21 Sep	Wizz Air
07 Sep - 04 Oct	Wizz Air UK
10 Sep - 13 Oct	Wizz Air UK
22 Sep - 30 Sep	Wizz Air UK
07 Sep - 21 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 540€

Return flights