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

Return flights

26 Aug - 17 Sep	Wizz Air UK
26 Aug - 04 Sep	Wizz Air UK
23 Aug - 06 Sep	Wizz Air UK
20 Aug - 31 Aug	easyJet
18 Aug - 31 Aug	easyJet
27 Aug - 04 Sep	easyJet
16 Aug - 30 Aug	Wizz Air UK
01 Aug - 18 Aug	Ryanair
26 Aug - 05 Sep	easyJet
20 Aug - 28 Aug	Wizz Air
05 Aug - 22 Aug	Ryanair
04 Aug - 28 Aug	Wizz Air UK
03 Aug - 15 Aug	Wizz Air UK
28 Aug - 19 Sep	easyJet
01 Aug - 15 Aug	Ryanair
01 Aug - 05 Aug	easyJet
29 Aug - 07 Sep	easyJet

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 723€

Return flights