Cheapest return flights from London to Phnom-penh in September from $488

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

Return flights

26 Sep - 17 Oct China Southern
26 Sep - 06 Oct China Southern
29 Sep - 06 Oct China Southern
29 Sep - 09 Oct China Southern
29 Sep - 19 Oct China Southern
17 Sep - 23 Oct China Southern
15 Sep - 05 Oct China Southern
25 Sep - 06 Oct China Southern
19 Sep - 20 Oct China Southern
07 Sep - 25 Sep Shenzhen Airlines
12 Sep - 11 Oct Shenzhen Airlines
01 Sep - 13 Sep Shenzhen Airlines
22 Sep - 28 Sep Shenzhen Airlines
01 Sep - 16 Sep Shenzhen Airlines
12 Sep - 20 Sep Shenzhen Airlines
08 Sep - 21 Sep Shenzhen Airlines
01 Sep - 08 Sep China Southern
21 Sep - 26 Sep Shenzhen Airlines
15 Sep - 30 Sep Air India
13 Sep - 28 Sep Turkmenistan Airlines

Also check the deals for one-way flights from London to Phnom-penh in September.

Skyscanner

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

Feel free to contact us with any feedback or request another flight research.