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

Return flights

31 Aug - 13 Sep	Shenzhen Airlines
29 Aug - 11 Sep	Shenzhen Airlines
29 Aug - 13 Sep	Shenzhen Airlines
29 Aug - 12 Sep	Shenzhen Airlines
28 Aug - 04 Sep	China Southern
22 Aug - 06 Sep	Air China
26 Aug - 16 Sep	Oman Air
03 Aug - 17 Aug	Oman Air
20 Aug - 10 Sep	Etihad Airways
15 Aug - 01 Sep	Wizz Air UK
22 Aug - 26 Aug	Wizz Air UK
12 Aug - 19 Aug	Norwegian
25 Aug - 31 Aug	Wizz Air UK
05 Aug - 09 Sep	Wizz Air Malta
08 Aug - 11 Aug	Air India
19 Aug - 31 Aug	Wizz Air UK
19 Aug - 30 Aug	Wizz Air Malta
06 Aug - 20 Aug	Oman Air
08 Aug - 22 Aug	Air India
12 Aug - 30 Aug	Wizz Air UK

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.

Book a cheap hotel in Phnom-penh

Cheap car rent in Phnom-penh

Cheapest return flights from London to Phnom-penh in August from 517€

Return flights