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

Return flights

25 Aug - 29 Sep	Ryanair
29 Aug - 29 Sep	Ryanair
30 Aug - 29 Sep	Ryanair
27 Aug - 10 Sep	Ryanair
31 Aug - 14 Sep	Ryanair
31 Aug - 21 Sep	Ryanair
29 Aug - 28 Sep	Ryanair
29 Aug - 15 Sep	Ryanair
25 Aug - 16 Sep	Ryanair
30 Aug - 14 Sep	Ryanair
20 Aug - 27 Aug	Ryanair
16 Aug - 31 Aug	Ryanair
01 Aug - 05 Aug	Ryanair
06 Aug - 15 Aug	Ryanair
05 Aug - 12 Aug	Ryanair
09 Aug - 31 Aug	Ryanair
01 Aug - 08 Aug	Ryanair
22 Aug - 25 Aug	Ryanair
01 Aug - 10 Aug	Ryanair
04 Aug - 10 Aug	Ryanair

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 590€

Return flights