Cheapest return flights from London to Phnom-penh in December from $644

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

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

Return flights

01 Dec - 29 Dec Air China
01 Dec - 22 Dec Air China
01 Dec - 28 Dec Air China
25 Dec - 15 Jan Air China
24 Dec - 07 Jan China Airlines
24 Dec - 14 Jan Singapore Airlines
24 Dec - 04 Jan Cathay Pacific
09 Dec - 02 Jan Cathay Pacific
22 Dec - 12 Jan Air China
22 Dec - 11 Jan Singapore Airlines
21 Dec - 06 Jan Lufthansa
26 Dec - 03 Jan Cathay Pacific
20 Dec - 02 Jan Asiana Airlines

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

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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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