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

Return flights

11 Sep - 21 Sep	ITA Airways
18 Sep - 28 Oct	ITA Airways
08 Sep - 16 Sep	ITA Airways
08 Sep - 22 Sep	ITA Airways
05 Sep - 16 Sep	ITA Airways
03 Sep - 18 Sep	ITA Airways
08 Sep - 21 Sep	ITA Airways
05 Sep - 18 Sep	ITA Airways
12 Sep - 21 Sep	ITA Airways
15 Sep - 29 Sep	ITA Airways
04 Sep - 01 Oct	ITA Airways
13 Sep - 14 Oct	ITA Airways
03 Sep - 27 Sep	ITA Airways
12 Sep - 04 Oct	ITA Airways
04 Sep - 05 Oct	ITA Airways
19 Sep - 06 Oct	ITA Airways
15 Sep - 05 Oct	ITA Airways
18 Sep - 05 Oct	ITA Airways
10 Sep - 08 Oct	ITA Airways
26 Sep - 23 Oct	ITA Airways

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 $872

Return flights