Cheapest return flights from London to Phnom-penh in December from $545

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 - 15 Dec Air China
03 Dec - 17 Dec Air China
30 Dec - 30 Jan Air China
01 Dec - 13 Dec Air China
04 Dec - 09 Dec China Southern
15 Dec - 29 Dec LOT
10 Dec - 17 Dec Thai Airways
27 Dec - 11 Jan China Airlines
09 Dec - 06 Jan Thai Airways
25 Dec - 09 Jan British Airways
26 Dec - 11 Jan Malaysia Airlines
25 Dec - 10 Jan British Airways
24 Dec - 09 Jan Cathay Pacific
26 Dec - 09 Jan Cathay Pacific
24 Dec - 10 Jan Singapore Airlines
26 Dec - 10 Jan Cathay Pacific
17 Dec - 26 Dec China Southern
19 Dec - 31 Dec Thai Airways

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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