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

Return flights

01 Dec - 07 Dec	Ryanair
02 Dec - 31 Jan	Ryanair
08 Dec - 09 Jan	Ryanair
01 Dec - 10 Dec	Emirates
12 Dec - 19 Dec	Ryanair
04 Dec - 11 Dec	Emirates
01 Dec - 30 Jan	Emirates
08 Dec - 23 Dec	Emirates
30 Dec - 13 Jan	Emirates
05 Dec - 21 Dec	Emirates
01 Dec - 12 Dec	Emirates
01 Dec - 28 Dec	Emirates
08 Dec - 29 Dec	Emirates
02 Dec - 11 Jan	Emirates
24 Dec - 05 Jan	Pegasus Airlines
24 Dec - 01 Jan	Pegasus Airlines
29 Dec - 18 Jan	Emirates
25 Dec - 15 Jan	Emirates
24 Dec - 03 Jan	Pegasus Airlines
24 Dec - 31 Dec	Emirates

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

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 December from 771€

Return flights