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

Return flights

26 Aug - 15 Sep	Ryanair
27 Aug - 02 Sep	Ryanair
29 Aug - 20 Sep	Ryanair
26 Aug - 17 Sep	Emirates
26 Aug - 09 Sep	Emirates
17 Aug - 16 Sep	Ryanair
29 Aug - 13 Sep	Emirates
07 Aug - 27 Aug	Ryanair
20 Aug - 31 Aug	Ryanair
06 Aug - 01 Sep	Ryanair
18 Aug - 18 Sep	Emirates
04 Aug - 18 Aug	Ryanair
04 Aug - 11 Aug	Ryanair
15 Aug - 22 Aug	Royal Jordanian
08 Aug - 29 Aug	Ryanair
15 Aug - 23 Aug	Ryanair
05 Aug - 22 Aug	Ryanair
11 Aug - 17 Aug	Emirates
02 Aug - 16 Aug	Ryanair

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 758€

Return flights