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

Return flights

06 Aug - 07 Sep	Eurowings
27 Aug - 15 Sep	KLM
27 Aug - 17 Sep	Aegean Airlines
06 Aug - 12 Aug	Eurowings
29 Aug - 15 Sep	KLM
22 Aug - 12 Sep	Turkish Airlines
19 Aug - 20 Sep	Eurowings
13 Aug - 14 Aug	Air India
06 Aug - 07 Aug	Air India
13 Aug - 19 Aug	Air India
05 Aug - 07 Aug	Air India
06 Aug - 10 Sep	Eurowings
22 Aug - 08 Sep	KLM
07 Aug - 12 Aug	Air India
19 Aug - 16 Sep	Air India
06 Aug - 18 Aug	Air India
25 Aug - 24 Sep	Air India
07 Aug - 14 Aug	Air India
05 Aug - 19 Aug	Air India
07 Aug - 18 Aug	Air India

Also check the deals for one-way flights from London to Kathmandu in August.

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 August from 613€

Return flights