Cheapest return flights from London to Phnom-penh in September from $624

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

Return flights

01 Sep - 30 Sep Shenzhen Airlines
26 Sep - 11 Oct Shenzhen Airlines
27 Sep - 11 Oct Shenzhen Airlines
27 Sep - 12 Oct Shenzhen Airlines
26 Sep - 10 Oct Shenzhen Airlines
26 Sep - 18 Oct Shenzhen Airlines
05 Sep - 02 Oct Shenzhen Airlines
27 Sep - 04 Oct Shenzhen Airlines
14 Sep - 04 Oct Shenzhen Airlines
12 Sep - 13 Oct China Southern
26 Sep - 03 Oct China Southern
01 Sep - 13 Sep Shenzhen Airlines
08 Sep - 21 Sep Shenzhen Airlines
12 Sep - 25 Sep Shenzhen Airlines
12 Sep - 26 Sep Shenzhen Airlines
02 Sep - 09 Sep China Southern
14 Sep - 21 Sep Shenzhen Airlines
06 Sep - 29 Sep Austrian Airlines
24 Sep - 29 Sep Shenzhen Airlines
12 Sep - 24 Sep Shenzhen Airlines

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

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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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