Cheapest return flights from London to Phnom-penh in September from $546

Best time to book flights for London (LON) to Phnom-penh (PNH) flights at AirHint

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

Return flights

01 Sep - 13 Oct Air China
19 Sep - 11 Oct China Southern
26 Sep - 13 Oct China Southern
19 Sep - 14 Oct China Southern
27 Sep - 11 Oct China Southern
05 Sep - 14 Sep Singapore Airlines
15 Sep - 22 Sep Singapore Airlines
13 Sep - 25 Sep Singapore Airlines
15 Sep - 01 Oct Vietnam Airlines
19 Sep - 26 Sep Singapore Airlines
13 Sep - 20 Sep Singapore Airlines
12 Sep - 20 Sep Singapore Airlines
06 Sep - 27 Sep China Southern

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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