AirHint found the following cheapest return flights from London (STN) to Phnom-penh (PNH) in August 2025 (see full year).

Return flights

19 Aug - 16 Sep	Ryanair
14 Aug - 05 Sep	Ryanair
14 Aug - 14 Sep	Ryanair
28 Aug - 10 Sep	Ryanair
21 Aug - 31 Aug	Ryanair
19 Aug - 31 Aug	Ryanair
22 Aug - 29 Aug	Ryanair
23 Aug - 06 Sep	Ryanair
24 Aug - 31 Aug	AJet
11 Aug - 18 Aug	Ryanair
23 Aug - 02 Sep	Ryanair
23 Aug - 31 Aug	Ryanair
20 Aug - 31 Aug	Ryanair
18 Aug - 07 Sep	Ryanair
31 Aug - 21 Sep	Emirates
14 Aug - 20 Aug	Ryanair
10 Aug - 13 Aug	Emirates
05 Aug - 10 Sep	Emirates
04 Aug - 25 Aug	Ryanair
12 Aug - 09 Sep	Emirates

Also check the deals for one-way flights from London to Phnom-penh 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 Phnom-penh in August from 802€

Return flights