AirHint found the following cheapest return flights from London (LON) to Kathmandu (KTM) in September 2026 (see full year).

Return flights

28 Sep - 12 Oct	Ryanair
26 Sep - 12 Oct	Wizz Air UK
28 Sep - 11 Oct	Ryanair
16 Sep - 30 Sep	Wizz Air Malta
28 Sep - 10 Oct	Ryanair
11 Sep - 11 Oct	Wizz Air Malta
14 Sep - 28 Sep	Ryanair
14 Sep - 27 Sep	Ryanair
07 Sep - 16 Sep	Wizz Air
12 Sep - 26 Sep	Ryanair
14 Sep - 26 Sep	Ryanair
16 Sep - 01 Oct	Wizz Air Malta
09 Sep - 15 Sep	Ryanair
12 Sep - 29 Sep	Wizz Air UK
11 Sep - 26 Sep	Pegasus Airlines
12 Sep - 20 Sep	Wizz Air Malta
26 Sep - 10 Oct	Wizz Air UK
30 Sep - 17 Oct	Ryanair
21 Sep - 12 Oct	Ryanair
30 Sep - 14 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 497€

Return flights