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

Return flights

29 Aug - 05 Sep	China Southern
27 Aug - 05 Sep	Air China
31 Aug - 09 Sep	China Eastern
29 Aug - 13 Sep	China Eastern
24 Aug - 03 Sep	Air China
26 Aug - 19 Sep	Wizz Air UK
23 Aug - 05 Sep	Wizz Air UK
25 Aug - 31 Aug	China Eastern
27 Aug - 24 Sep	easyJet
24 Aug - 31 Aug	Wizz Air UK
23 Aug - 27 Aug	Air China
22 Aug - 26 Aug	Wizz Air UK
24 Aug - 28 Aug	Wizz Air UK
21 Aug - 27 Aug	Wizz Air UK
31 Aug - 21 Sep	China Eastern
25 Aug - 01 Sep	Wizz Air UK
22 Aug - 27 Aug	Wizz Air UK
22 Aug - 29 Aug	Wizz Air UK
30 Aug - 31 Aug	Turkish Airlines

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 620€

Return flights