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

Return flights

01 Jul - 22 Jul	Air India
01 Jul - 15 Jul	Air India
08 Jul - 29 Jul	Air India
06 Jul - 17 Aug	Shenzhen Airlines
01 Jul - 31 Jul	China Southern
04 Jul - 12 Jul	Shenzhen Airlines
07 Jul - 24 Jul	Shenzhen Airlines
07 Jul - 20 Jul	Shenzhen Airlines
03 Jul - 31 Jul	China Southern
10 Jul - 19 Jul	China Southern
03 Jul - 11 Jul	Emirates
08 Jul - 08 Aug	Air India
08 Jul - 26 Aug	Air India
17 Jul - 05 Aug	China Southern
30 Jul - 06 Aug	China Southern
13 Jul - 03 Aug	China Southern
19 Jul - 02 Aug	Shenzhen Airlines
30 Jul - 15 Aug	Shenzhen Airlines
30 Jul - 13 Aug	Scandinavian Airlines
31 Jul - 21 Aug	Air India

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

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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Cheapest return flights from London to Phnom-penh in July from $960

Return flights