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

23 Sep - 07 Oct China Southern
29 Sep - 10 Oct Shenzhen Airlines
15 Sep - 05 Oct China Southern
08 Sep - 18 Sep Shenzhen Airlines
14 Sep - 04 Oct China Southern
25 Sep - 04 Oct China Southern
15 Sep - 27 Sep Shenzhen Airlines
14 Sep - 27 Sep Shenzhen Airlines
13 Sep - 27 Sep Shenzhen Airlines
19 Sep - 05 Oct Shenzhen Airlines
23 Sep - 27 Sep Malaysia Airlines
17 Sep - 01 Oct Malaysia Airlines
25 Sep - 01 Oct Malaysia Airlines
01 Sep - 15 Sep Singapore Airlines
15 Sep - 29 Sep Singapore Airlines
04 Sep - 11 Sep Singapore Airlines
19 Sep - 29 Sep Malaysia Airlines
06 Sep - 29 Sep China Southern
29 Sep - 06 Oct Thai 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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