Cheapest return flights from London to Phnom-penh in September from $522

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

29 Sep - 06 Oct China Southern
12 Sep - 06 Oct China Southern
26 Sep - 18 Oct China Southern
15 Sep - 06 Oct China Southern
18 Sep - 06 Oct China Southern
26 Sep - 05 Oct China Southern
10 Sep - 09 Oct China Southern
12 Sep - 03 Oct China Southern
15 Sep - 03 Oct China Southern
07 Sep - 07 Oct China Southern
09 Sep - 16 Sep Singapore Airlines
01 Sep - 08 Sep Ryanair
07 Sep - 24 Sep Singapore Airlines
07 Sep - 14 Sep Singapore Airlines
07 Sep - 16 Sep Singapore Airlines
04 Sep - 13 Sep Singapore Airlines
10 Sep - 26 Sep Singapore Airlines
14 Sep - 25 Sep Singapore Airlines
10 Sep - 19 Sep Singapore Airlines
17 Sep - 26 Sep Singapore 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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