Cheapest return flights from London to Phnom-penh in September from $523

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

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

Return flights

29 Sep - 09 Oct China Southern
22 Sep - 15 Oct China Southern
05 Sep - 14 Sep Singapore Airlines
19 Sep - 29 Sep Singapore Airlines
16 Sep - 30 Sep Singapore Airlines
16 Sep - 27 Sep Wizz Air UK
24 Sep - 30 Sep Gulf Air
07 Sep - 24 Sep Singapore Airlines
11 Sep - 25 Sep China Southern
04 Sep - 23 Sep Emirates
15 Sep - 29 Sep Singapore Airlines
24 Sep - 29 Sep Singapore Airlines
24 Sep - 01 Oct Emirates
16 Sep - 07 Oct British Airways
30 Sep - 10 Oct Emirates
15 Sep - 06 Oct British Airways

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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