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

Return flights

25 Aug - 30 Sep	Ryanair
19 Aug - 19 Sep	Ryanair
29 Aug - 17 Sep	Ryanair
19 Aug - 16 Sep	Ryanair
19 Aug - 02 Sep	Ryanair
30 Aug - 10 Sep	Ryanair
26 Aug - 31 Aug	Ryanair
10 Aug - 22 Aug	Ryanair
15 Aug - 10 Sep	Ryanair
13 Aug - 22 Aug	Ryanair
24 Aug - 31 Aug	Ryanair
13 Aug - 29 Aug	Ryanair
06 Aug - 10 Sep	Ryanair
21 Aug - 17 Sep	Ryanair
09 Aug - 24 Aug	Pegasus Airlines
25 Aug - 25 Sep	Ryanair
13 Aug - 19 Aug	Pegasus Airlines
10 Aug - 17 Aug	Pegasus Airlines
12 Aug - 19 Aug	Ryanair
14 Aug - 17 Aug	Pegasus Airlines

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 $625

Return flights