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

Return flights

19 Aug - 26 Aug	Wizz Air UK
27 Aug - 10 Sep	Wizz Air Malta
29 Aug - 11 Sep	Wizz Air UK
30 Aug - 17 Sep	Wizz Air UK
28 Aug - 04 Sep	China Southern
26 Aug - 09 Sep	Wizz Air UK
31 Aug - 14 Sep	Wizz Air UK
26 Aug - 17 Sep	Wizz Air UK
29 Aug - 12 Sep	Wizz Air UK
30 Aug - 07 Sep	Wizz Air UK
19 Aug - 02 Sep	Wizz Air UK
07 Aug - 14 Aug	Wizz Air UK
22 Aug - 25 Aug	Gulf Air
11 Aug - 18 Aug	Wizz Air UK
21 Aug - 28 Aug	Wizz Air UK
10 Aug - 13 Aug	Wizz Air UK
10 Aug - 24 Aug	Wizz Air UK
13 Aug - 23 Aug	easyJet
11 Aug - 20 Aug	Wizz Air UK
05 Aug - 19 Aug	SKY express

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 661€

Return flights